1. Definitions and Terms

For the purposes of this User Agreement, the following terms shall have the meanings set out below:

1.1. LingTrio Service (the “Service”) — the software, mobile application, web platform, and related LingTrio technologies that provide the User with access to learning materials, interactive exercises, artificial intelligence features, knowledge-analysis tools, and other educational functionalities.

1.2. Company — the owner of the LingTrio Service, responsible for its administration, maintenance, development, and provision of access.

1.3. User — an individual who has reached the legally permitted age to use the Service, as well as a legal entity or sole proprietor who has obtained access to the Service under a contract, corporate subscription, educational license, or other agreement with the Company.

1.4. Account — the User’s personal profile containing data, learning history, settings, subscriptions, token limits, and other information related to the use of the Service.

1.5. Service Content — any materials made available within the Service, including lessons, exercises, texts, videos, audio files, images, prompts, learning algorithms, gamified elements, interface components, and other intellectual outputs.

1.6. User Content — any data, materials, phrases, audio recordings, notes, messages, answers, or other information that the User publishes, uploads, or transmits through the Service.

1.7. Artificial Intelligence (AI) — the technologies embedded in the Service for processing and generating text, images, and audio, including third-party APIs (such as OpenAI) used for response analysis, generation of training materials, knowledge assessment, and User interaction.

1.8. Tokens — the calculation unit used for AI features within the Service, reflecting the volume of requests and model outputs. Tokens may have limits, different consumption rates, and depend on the subscription type.

1.9. Subscription — paid access to advanced Service features, including ad removal, increased token limits, access to advanced lessons, the AI-tutor, and other capabilities.

1.10. Trial Period — a time-limited free access period during which new Users may evaluate certain features of the Service.

1.11. Ad-Supported Version — a free mode of using the Service in which advertisements are displayed and certain features may be limited.

1.12. Devices — mobile phones, tablets, computers, and other technical means through which the User accesses the Service.

1.13. Personal Data — any information relating to the User that is subject to processing in accordance with the Privacy Policy and applicable law.

1.14. Agreement — this User Agreement, including all amendments, additions, and integral parts thereof.

1.15. License — a limited, non-exclusive, non-transferable right to use the Service granted by the Company to the User under this Agreement. The License does not transfer any intellectual property rights and is valid only within the scope expressly defined by the Company.

2. Acceptance of the Terms

2.1. This User Agreement (the “Agreement”) is a legally binding document governing the relationship between the User and LingTrio LLC when using the LingTrio Service.

2.2. The User confirms their full and unconditional acceptance of this Agreement at the moment they begin using the Service, including downloading the mobile application, installation, registration, authorization, or actual use of any functionality of the Service. Use of the Service constitutes acceptance of the Agreement in its entirety.

2.3. If the User does not agree with the terms of this Agreement, they must immediately stop using the Service and delete the application from their device.

2.4. By using the Service, the User also confirms acceptance of the rules and policies of third-party platforms through which access to the Service is provided, including Google Play, Apple App Store, and other app marketplaces. The restrictions, refund policies, payment methods, and other terms of such platforms additionally apply to the User.

2.5. The Company reserves the right to unilaterally amend this Agreement. The updated version becomes effective upon its publication in the Service or on the LingTrio website unless otherwise explicitly stated.

2.6. Continued use of the Service after any amendments signifies the User’s acceptance of the updated version of the Agreement. If the User does not agree with the new version, they must discontinue use of the Service.

2.7. The use of the Service is governed by the laws of the State of Florida, USA, in accordance with the registration of LingTrio LLC.

3. Description of the LingTrio Service
 3.1. The LingTrio Service is a digital educational platform designed for self-directed foreign-language learning. The Service includes a set of learning tools based on interactive lessons, exercises, and artificial intelligence technologies.
3.2. The core functionality of the Service includes, but is not limited to, the following:
– text and video lessons
– audio exercises and pronunciation trainers
– tests, quizzes, and interactive tasks
– a personal dictionary, word memory, and flashcards
– saving learning history, progress, and statistics
– generation of explanations, prompts, and examples using artificial intelligence
– text-based speaking practice with an AI tutor
– automatic error analysis and explanations provided by AI
– personalized learning based on the User’s past actions and performance
3.3. Artificial intelligence within the Service is used for:
– generating responses, prompts, and learning materials
– conducting text-based dialogues and speaking practice
– explaining grammar, vocabulary, and correcting the User’s errors
The User acknowledges that artificial intelligence technologies may contain inaccuracies and accepts the associated risks when using AI-based features.
3.4. The Service is not an accredited educational institution and does not provide state-recognized education. Any certificates issued within the Service (if applicable) are for informational purposes only and are not official documents.
3.5. The Service is available in all countries where access to the internet and digital services is not restricted by local law. The User is solely responsible for complying with the laws of their country when using the Service. The Company may restrict access to the Service in certain jurisdictions in accordance with U.S. law, including export control and sanctions regulations.
3.6. The functionality of the Service is regularly updated and may be modified, expanded, or temporarily suspended by the Company without prior notice. The User agrees that the structure, logic, scope, and features of the Service may be changed during its development.
3.7. Certain features of the Service may be available only with an internet connection, an active subscription, or a sufficient number of tokens if such system is provided by the applicable pricing plan.

4. Account Registration and Security (Extended Legal Version)
 4.1. To access the functionality of the Service, the User must create an Account and provide accurate, correct, and up-to-date information, including an email address, phone number, or other details required by the registration form. The Company may introduce additional registration and authentication methods.
4.2. The User guarantees that all information provided belongs personally to them (or, in the case of a legal entity, to the corresponding organization) and does not violate the rights of third parties. The use of temporary, disposable, or invalid email addresses may result in restricted access or deletion of the Account.
4.3. The User agrees to update their registration information in a timely manner. The Company is not responsible for losses caused by an inability to contact the User due to outdated information.
4.4. The User is solely responsible for maintaining the confidentiality of their Account credentials, including passwords, verification codes, access tokens, and any other authentication methods. These credentials must be stored securely and protected from third-party access.
4.5. The User is prohibited from:
– sharing their Account credentials with third parties
– allowing others to use their Account
– selling, renting, or otherwise transferring the Account
– creating more than one Account to bypass limitations
– using third-party data for registration
4.6. Any actions performed through the Account are deemed to be performed by the User. The User bears full responsibility for such actions, whether carried out by the User personally or by third parties who gained access due to insufficient security measures.
4.7. If unauthorized access, data leakage, hacking, password compromise, attempted fraud, or any other security threat is suspected, the User must immediately notify the Company. Until notification is received, the User is responsible for all consequences arising from the use of their Account.
4.8. The Company may apply additional security measures, including but not limited to:
– two-factor authentication (2FA)
– identity verification requirements
– temporary Account blocking
– review of suspicious activity
– requests for documents confirming identity or authority
4.9. The Company may temporarily restrict or block an Account in cases of:
– suspected violation of the Agreement
– attempts to hack, interfere with, or bypass technical protections
– use of automated scripts, bots, or external tools to simulate User actions
– excessive activity posing risks to the stability of the Service
– unlawful use of tokens or attempts to manipulate subscription systems
4.10. The Company may request User identity verification, including document submission, if required for legal compliance, fraud prevention, account recovery, or dispute resolution.
4.11. If the User deletes the Account or if it is blocked in accordance with the Agreement, the Company may permanently delete or anonymize data associated with the Account, including learning progress, statistics, saved words, AI history, and other materials. Recovery of deleted data is not guaranteed.
4.12. The User acknowledges that the Company is not liable for losses resulting from:
– third-party use of the Account
– interrupted or incomplete actions due to loss of access
– malfunction of the User’s equipment or software
– errors or improper use of AI-based features
4.13. If the User is a legal entity, access to the corporate Account is provided to its authorized representatives. The legal entity is responsible for the actions of its employees and other persons who gain access to the Account. The Company may request documents confirming representative authority.

5. Age Restrictions
 5.1. The Service may be used only by Users who have reached the minimum age required by the laws of their country of residence, but not younger than:
– 13 years old in the United States (in accordance with COPPA)
– 16 years old in EU member states (unless a different age of consent is set by national law)
– 13–18 years old with parental or legal guardian consent (if the age of majority is above 18 or otherwise specified by local law)
5.2. Users aged 13 to 18 (or any other age of majority under the law of their country of residence) may use the Service only with parental or legal guardian consent. Use of the Service by such individuals constitutes confirmation that such consent has been obtained.
5.3. The Company does not knowingly collect personal data from children below the legally permitted age. If the Company becomes aware that an Account was created by a child under the required age without verifiable parental consent, the Account will be suspended or deleted, and the data will be removed in accordance with applicable laws (including COPPA and GDPR).
5.4. Parents, legal guardians, or educational institutions providing access to minors are responsible for:
– monitoring the minor’s use of the Service
– ensuring the accuracy of submitted information
– ensuring the minor’s compliance with this Agreement

6. User Rights and Obligations
 6.1. User Rights
 The User has the right to:
6.1.1. Use the Service within the limits set by this Agreement, applicable pricing plans, and technical capabilities.
6.1.2. Create an Account, configure it, track progress, and use the available learning materials, AI features, and other tools of the Service.
6.1.3. Purchase paid subscriptions, additional services, tokens, or other digital features as defined by the Company.
6.1.4. Contact the Company’s support service with inquiries, complaints, and suggestions for improving the Service.
6.1.5. Request deletion of their Account and data in accordance with the Privacy Policy.
6.1.6. Receive information about pricing plans, subscription terms, limitations, functionality, and Service updates.
6.1.7. Use the Service exclusively for personal, non-commercial purposes unless otherwise specified by a corporate or educational agreement.

6.2. User Obligations
 The User agrees to:
6.2.1. Comply with this Agreement, the Privacy Policy, and all applicable laws, including those of the United States, the User’s country of residence, and international regulations.
6.2.2. Provide only accurate and up-to-date information during registration and use of the Service.
6.2.3. Ensure the security of their login credentials, refrain from sharing access with third parties, and avoid creating security risks.
6.2.4. Use the Service in good faith, refrain from violating the rights of other Users or third parties, and avoid harming the Service’s operation.
6.2.5. Not use the Service for:
– distributing prohibited information
– violating intellectual property rights
– fraud or bypassing technical restrictions
– malicious activity (bots, spam, SQL injections, hacking, etc.)
– interfering with AI operations, APIs, or automation
– collecting data about other Users or the Service
6.2.6. Not use automated tools, programs, scripts, emulators, or bots to generate requests, simulate actions, or bypass token or subscription systems.
6.2.7. Not copy, distribute, or use Service Content — including AI responses, lessons, audio, video, or text materials — for commercial purposes without written permission from the Company.
6.2.8. Not upload materials that violate law, moral standards, safety rules, or the intellectual property rights of third parties.
6.2.9. Immediately notify the Company of any security violations, suspicious activity, or unauthorized attempts to access the Service.
6.2.10. Maintain their devices and internet connection in proper working condition. The Company is not responsible for Service performance on inadequate equipment or limited internet access.

6.3. Special Obligations When Using AI
 The User acknowledges and agrees that:
6.3.1. AI features may contain inaccuracies, errors, incomplete information, or disputable data. Use of AI materials is at the User’s own risk.
6.3.2. The User may not use AI-generated content for:
– illegal activities
– creating harmful or dangerous content
– impersonating third parties
– bypassing model restrictions
– mass-generation of content for commercial purposes
6.3.3. LingTrio may limit request frequency, token usage, processing speed, and access to specific AI functions to ensure Service stability.

6.4. User Liability
 6.4.1. The User bears full responsibility for any actions performed in the Service under their identity.
6.4.2. The User is responsible for any content they upload or create within the Service.
6.4.3. The User fully releases the Company from liability for losses arising from:
– violation of this Agreement
– sharing access with third parties
– use of the Service by minors without proper consent
– errors made by the User when interacting with AI
– technical failures on the User’s side

7. Rights and Obligations of the Company
 7.1. Company Rights
 The Company has the right to:
7.1.1. Provide the User with access to the Service within the limits defined by this Agreement, pricing plans, and technical capabilities.
7.1.2. Unilaterally modify, update, develop, test, expand, or reduce the functionality of the Service without prior notice, including changes to:
– interface
– operational algorithms
– AI models
– token systems
– lesson structure and materials
– technical limitations
7.1.3. Restrict the User’s access to the Service or specific features in cases of Agreement violations, suspicious activity, exceeded limits, security risks, or illegal actions.
7.1.4. Request additional verification from the User, including documents confirming identity or authority.
7.1.5. Suspend parts of the Service for technical maintenance, updates, or bug fixes.
7.1.6. Establish, modify, or discontinue pricing plans, subscriptions, token rules, trial periods, and ad-supported versions.
7.1.7. Limit AI request volumes, response times, server load, or access levels to ensure Service stability and security.
7.1.8. Use anonymized User data to improve learning quality, optimize AI, conduct analytics, and develop the Service.
7.1.9. Remove or block any User Content that violates this Agreement, law, morality, or threatens Service security.
7.1.10. Terminate a User’s access in cases of severe or repeated Agreement violations.

7.2. Company Obligations
 The Company agrees to:
7.2.1. Provide the User with access to the Service in accordance with this Agreement and applicable law.
7.2.2. Maintain the technical functioning of the Service within reasonable limits and take measures to ensure its stable operation and development.
7.2.3. Process User personal data in accordance with the Privacy Policy and data protection laws.
7.2.4. Take measures to protect User data from unauthorized access, loss, or alteration.
7.2.5. Inform Users of significant changes to pricing plans or subscription terms if such changes affect paid features.
7.2.6. Ensure correct operation of paid features for Users with an active subscription.
7.2.7. Review User inquiries within a reasonable timeframe.
7.2.8. Address critical bugs and outages that affect Service availability within a reasonable technical time frame.

7.3. Limitations of Company Obligations
 The Company is NOT obligated to and does NOT guarantee:
7.3.1. uninterrupted, error-free, secure, expectation-matching, or always-available operation of the Service
7.3.2. that the Service will meet the User’s subjective expectations or be suitable for any specific goals, tasks, or requirements
7.3.3. the absence of technical failures, errors, delays, interruptions, data loss, malfunctioning AI models, third-party API issues, hosting disruptions, payment system failures, or other technological limitations
7.3.4. compensation for any User losses resulting from:
– internet connectivity failures
– malfunction or incompatibility of the User’s device
– errors or malfunctions of AI models
– actions of third parties
– loss of access, progress, materials, or tokens
– server or cloud platform failures
– payment system disruptions
– other circumstances beyond the Company’s reasonable control
7.3.5. storage, recovery, or backup of User data beyond what is defined by the Company’s internal technical policies
7.3.6. advance notification of failures or Service changes when such events occur unexpectedly or beyond the Company’s control

7.4. AI-Specific Provisions and Liability Limitations
 The Company notifies, and the User acknowledges, that:
7.4.1. AI models may produce errors, inaccurate, outdated, contradictory, or incomplete responses.
7.4.2. LingTrio does not guarantee absolute accuracy of AI-generated content, recommendations, explanations, or knowledge-analysis results.
7.4.3. The User uses AI-generated responses entirely at their own risk.
7.4.4. The Company is not responsible for damage resulting from:
– use of AI-generated content
– misinterpretation of AI responses
– User interpretations or actions based on AI materials

8. Payments and Subscriptions
 8.1. General Provisions
 8.1.1. Access to certain features of the Service is provided on a paid basis through subscription or one-time payment models.
8.1.2. Pricing, subscription types, duration, and auto-renewal terms are indicated within the Service or on the Company’s official website.
8.1.3. By purchasing a subscription or making a payment, the User confirms that they have read and agree to the payment terms, auto-renewal, and refund policies.
8.1.4. The Company may modify subscription prices, payment terms, and available plans. Changes apply to new subscriptions and to renewals of active subscriptions unless otherwise required by law.

8.2. Automatic Subscription Renewal
 8.2.1. A subscription is automatically renewed for the same term and price until it is canceled by the User.
8.2.2. Subscription cancellation is only possible through:
– the App Store (if purchased via Apple)
– Google Play (if purchased via Google)
– the web dashboard or subscription management page (for web-based payments)
8.2.3. Deleting the application does not cancel the subscription and does not stop future billing.

8.3. Payment Methods
 8.3.1. Payments may be processed through:
– Apple App Store
– Google Play
– Stripe
– Payture
– other systems specified by the Company
8.3.2. By subscribing, the User authorizes the payment system to automatically charge the applicable fees.
8.3.3. The Company does not store bank card information and does not participate in approving or declining transactions — such actions are performed by payment systems and banks.

8.4. Refund Policy
 8.4.1. General Principle
Refunds for digital services and subscriptions are processed in accordance with the laws of the User’s country of residence and the policies of distribution platforms (Apple App Store, Google Play, Stripe, etc.).
The Company does not make refund decisions directly for purchases made through app stores — refunds are handled by the respective platform.
8.4.2. Commencement of Digital Service Delivery
The User acknowledges that digital content is considered delivered when they first perform any of the following actions:
– open a lesson, video, audio, or learning module
– complete a test, exercise, or interactive task
– use artificial intelligence features
– spend tokens
– create or submit any learning content
– interact with Service materials
After digital content delivery has begun, the User’s right to a refund may be limited by the laws of their country.
8.4.3. Refunds in the EU, UK, and other countries with a statutory cancellation period
If the User’s country provides a right to withdraw from digital content purchases within a statutory period (such as 14 days in the EU under Directive 2011/83/EU), a refund may be granted only if all of the following conditions are met:
– the User has not started using the digital content as defined in §8.4.2
– the request is submitted within the legally established cancellation period
– the request is submitted through the app store or payment system used for the original purchase
If the User has begun using the content, they lose the right to a refund unless otherwise expressly required by law.
8.4.4. Refunds in the United States and other countries without a statutory cancellation period
In jurisdictions without mandatory cancellation periods, refunds are processed only according to platform policies or if required by local law.
8.4.5. Technical Errors and Duplicate Charges
Refunds for erroneous or duplicate charges are processed according to the rules of the payment system or app store through which the purchase was made.
8.4.6. Who Reviews Refund Requests
– Apple App Store processes refunds independently via Apple Support
– Google Play processes refunds independently
– Stripe refunds are handled through LingTrio Support in accordance with Stripe’s policies and the User’s local laws
The Company cannot refund purchases made through the App Store or Google Play directly.

8.5. Taxes and Additional Fees
 8.5.1. Subscription prices may include taxes, fees, or charges in accordance with applicable laws.
8.5.2. In certain jurisdictions, app stores may automatically add tax to digital services; the Company does not control this.

8.6. Subscription Blocking Due to Violations
 8.6.1. The Company may temporarily restrict or block the User’s subscription in case of Agreement violations. Refunds are issued only when explicitly required by the User’s local law or the policies of distribution platforms.

8.7. Tokens and Other Digital Units
 8.7.1. Tokens are a digital feature of the Service and have no monetary value.
8.7.2. Spent or unused tokens are not eligible for refunds, compensation, or transfer.
8.7.3. The Company may change token pricing, consumption rules, and limits without prior notice.

9. Trial Period and Ad-Supported Version
 9.1. Trial Period
 9.1.1. The Company may offer Users a free trial period, allowing temporary access to paid features without charge.
9.1.2. The terms, duration, and available trial features are determined by the Company and may vary by country, platform, device, promotions, or testing programs.
9.1.3. At the end of the trial period, the subscription automatically converts to a paid plan unless the User cancels it in advance via the App Store, Google Play, or web dashboard (depending on the original purchase method).
9.1.4. If the User does not wish to continue with a paid subscription, they must cancel the trial before it ends. The User is solely responsible for timely cancellation.
9.1.5. Once the trial ends and the paid period begins, refunds are not provided.

9.2. Trial Period Limitations
 9.2.1. The Company may:
– modify trial conditions
– suspend the trial offer
– limit features available in trial mode
– offer trials only to specific User categories
9.2.2. The Company may refuse to provide a trial period to a User who has already used one or if abuse of trial access is suspected.

9.3. Ad-Supported Version of the Service
 9.3.1. The free version of the Service may contain advertisements, feature limitations, token limits, and other technical restrictions set by the Company.
9.3.2. The User understands and agrees that advertising is part of the free-access model and its display is a mandatory condition of using the free version.
9.3.3. The Company may modify:
– the frequency of advertisements
– the format of advertisements
– functional limitations of the free version
– the amount of available tokens
– the availability of certain lessons, materials, and AI features
9.3.4. The Company may discontinue the free or ad-supported version entirely, providing notice through an accessible communication channel.

9.4. Limitations for Free and Trial Versions
 9.4.1. The Company may set additional limits, including:
– number of AI requests
– processing speed of requests
– availability of lessons and exercises
– amount of accessible content
– limitations on saving progress
9.4.2. The Company does not guarantee availability of all features for free-version Users, including stable AI performance, advanced lessons, conversation history, statistics, or personalized content.

9.5. Transition to a Paid Subscription
 9.5.1. When a paid subscription is activated, additional features become available immediately after payment confirmation by the payment system.
9.5.2. The User agrees that transitioning to a paid subscription does not compensate for or extend limitations of the free or trial version.

10. Tokens, Usage Limits, and the Service’s Internal Unit
 10.1. General Provisions
 10.1.1. Certain features of the Service, including interaction with artificial intelligence, content generation, answer analysis, and other advanced tools, may require spending tokens — the digital unit that tracks usage.
10.1.2. Tokens represent an internal virtual unit of the Service and are not a monetary asset, security, electronic money, cryptocurrency, or financial instrument.
10.1.3. Tokens are intended solely for use within the Service and cannot be used outside of it.

10.2. Token Allocation
 10.2.1. The number of tokens available to the User depends on:
– the active subscription
– the pricing plan
– special promotions or loyalty programs
– the ad-supported or trial version
– Service limitations
10.2.2. The Company may modify the token allocation system at any time, including the amount, frequency, methods of receiving tokens, and their availability.
10.2.3. Tokens added through a subscription may have an expiration period. At the end of the billing cycle, unused tokens may be reset unless otherwise specified in the subscription terms.

10.3. Token Deduction
 10.3.1. Tokens are deducted automatically when using features that require AI processing or other computation-intensive operations.
10.3.2. The token cost (consumption per operation) depends on:
– the type of AI request
– processing complexity
– selected language
– request and response length
– internal technical parameters of the Service
10.3.3. The Company may modify token deduction rules, including increasing or decreasing operational costs, without prior notice to the User.
10.3.4. Tokens are deducted regardless of whether the User was satisfied with the AI’s response, as AI cannot guarantee perfect accuracy.

10.4. No Refund or Compensation of Tokens
 10.4.1. Tokens cannot be refunded or compensated in any form, including monetary compensation.
10.4.2. Unused tokens do not carry over to the next billing period and expire unless the pricing plan explicitly allows otherwise.
10.4.3. In case of Account deletion, subscription termination, blocking, or access restriction, tokens are not preserved or restored.
10.4.4. The Company does not compensate tokens deducted due to:
– incorrect User requests
– improper use of AI
– subjective dissatisfaction with AI responses
– technical limitations caused by the User’s device

10.5. Usage Limit Restrictions
 10.5.1. The Company sets limits on AI usage and other functions, which may include:
– daily and monthly limits
– request length limits
– request rate restrictions
– technical blocks when exceeding load thresholds
– limits on the number of dialogues, messages, or operations
10.5.2. The Company may temporarily reduce limits in cases of:
– high server load
– technical maintenance
– User abuse
– threats to Service stability
10.5.3. The User agrees that access to AI features may be restricted without prior notice.

10.6. Prohibited Actions With Tokens
 The User is prohibited from:
10.6.1. transferring tokens to third parties
10.6.2. selling, exchanging, or otherwise disposing of tokens
10.6.3. attempting to alter the token allocation or deduction system
10.6.4. using automated tools to obtain tokens
10.6.5. performing actions aimed at bypassing token limits

10.7. Company’s Right to Modify the Token System
 10.7.1. The Company may unilaterally modify:
– token allocation rules
– operational token costs
– limits
– pricing structures
– the availability of token-dependent features
10.7.2. Changes take effect upon publication in the Service or on the website.

11. User-Generated Content
 11.1. General Provisions
 11.1.1. The User may create, upload, submit, publish, or input text data, audio recordings, images, phrases, messages, answers, comments, and other materials (collectively, “User Content”), if supported by the Service’s functionality.
11.1.2. The User bears full responsibility for all User Content they create or upload.
11.1.3. The Company does not control and is not obligated to control User Content; however, it may review, remove, block, or restrict access to such content if it violates this Agreement or applicable law.

11.2. User License Granted to the Company
 11.2.1. By submitting User Content to the Service, the User grants the Company a non-exclusive, royalty-free, worldwide, perpetual license, revocable only where required by law, to use such content for:
– operating the Service
– analyzing User responses
– training personalized models
– improving learning quality and AI
– displaying content within the Service interface
– supporting technical processes
– storing and processing data
11.2.2. This license includes the Company’s right to:
– store the content
– process and modify it technically to operate the Service
– transfer it to third parties for hosting, maintenance, or AI processing
– use anonymized data for analytics and statistics
11.2.3. The Company does not use User Content for marketing purposes without the User’s separate consent.

11.3. User Content Requirements
 The User agrees that their content:
11.3.1. does not violate copyright, related rights, patents, trademarks, or any other third-party rights
11.3.2. does not contain:
– illegal materials
– harmful files, viruses, scripts, or automated tools
– data violating intellectual property rights
– personal data of third parties without consent
– defamation, threats, or insults
– sexual, pornographic, or violent content
– political or extremist propaganda
– materials violating U.S. law or the User’s local laws
11.3.3. is not created for the purpose of:
– fraud
– hacking the Service
– bypassing limits
– harming the Company or other Users

11.4. Company Rights Regarding User Content
 11.4.1. The Company may remove, modify, hide, or block User Content without notice in cases of:
– violation of this Agreement
– violation of law
– violation of third-party rights
– complaints from other Users or legal entities
– threats to Service operation
– inappropriate, offensive, or harmful content
11.4.2. The Company may restrict or block a User’s Account in cases of systematic content violations.

11.5. AI Content and User Responsibility
 11.5.1. The User understands and agrees that AI-generated content created based on User input is also considered User Content.
11.5.2. The User bears full responsibility for any actions taken based on AI-generated content, including:
– use of text, audio, or other materials
– publication of such content outside the Service
– consequences of misinterpreting AI recommendations
11.5.3. The Company is not responsible for errors, inaccuracies, or consequences of using AI-generated content.

11.6. Deletion of User Content
 11.6.1. User Content may be deleted by the User to the extent allowed by Service functionality.
11.6.2. The Company may retain backup copies of deleted content for a reasonable technical period if necessary for:
– security
– prevention of violations
– fulfillment of legal obligations
11.6.3. After Account deletion, User Content may be deleted, anonymized, or retained to the extent required by law or the Privacy Policy.

12. License to Use the Service
 12.1. Grant of License
 12.1.1. The Company grants the User a limited, non-exclusive, non-transferable, non-sublicensable license to use the Service for personal, non-commercial purposes in accordance with this Agreement.
12.1.2. The license is provided only for the duration of the active subscription, trial access, or free version if such access is permitted by the Company.
12.1.3. The license grants the User the right to use the Service solely within its intended functionality and only in the ways explicitly defined by the Company.

12.2. License Restrictions
 The User is prohibited from:
12.2.1. copying, modifying, adapting, translating, decompiling, disassembling, reverse engineering, decoding, or otherwise attempting to access the source code, algorithms, structure, or architecture of the Service
12.2.2. using the Service to create derivative products, educational materials, competing services, promotional materials, or any other commercial developments
12.2.3. transferring access to the Service to third parties, renting out the Account, selling, exchanging, or sublicensing access
12.2.4. interfering with the operation of the Service, including:
– hacking, bypassing technical restrictions, modifying data
– using automated tools (bots, scripts, parsers)
– attempting to manipulate tokens, limits, or AI features
12.2.5. using software designed for:
– automating actions within the Service
– mass generation of requests
– abusing subscription or token systems
– imitating user behavior
12.2.6. using the Service to provide educational services to third parties without written permission from the Company

12.3. Temporary Nature of the License
 12.3.1. The license terminates automatically upon:
– expiration of the paid subscription period
– cancellation of the subscription
– deletion of the Account by the User
– violation of this Agreement
– termination of the Service
12.3.2. After termination of the license, the User must immediately stop using the Service and delete the application from their devices (if applicable).

12.4. Company Rights Within the License
 The Company retains all rights not expressly granted to the User, including:
12.4.1. full ownership rights to:
– software
– AI models
– learning algorithms
– data and Service structure
– graphic elements
– video, audio, and text content
– source code
– databases
– interfaces
12.4.2. the right to modify or terminate the license
12.4.3. the right to introduce new usage rules, pricing plans, features, and restrictions

12.5. No Transfer of Intellectual Property Rights
 12.5.1. Nothing in this Agreement transfers any intellectual property rights to the User.
12.5.2. The User receives only a limited license to use the Service; no proprietary or exclusive rights are transferred.

12.6. Special Terms for Legal Entities
 12.6.1. If access is provided to a legal entity (corporate subscription, educational license), usage terms, license scope, and restrictions may be defined in a separate agreement.
12.6.2. In case of conflict, the separate agreement prevails.

13. Intellectual Property
 13.1. Ownership of Rights
 13.1.1. All exclusive rights to the Service and its components belong to the Company or its successors. These components include, but are not limited to:
– software code (frontend and backend)
– algorithms, architecture, and databases
– AI models, content generation logic, and analytical tools
– interface solutions, design, page structure, and navigation elements
– educational materials (texts, exercises, dialogues, video, audio, illustrations)
– linguistic models, training programs, and their structure
– logos, trademarks, brand identity, and the LingTrio trade name
– technical documentation and internal tools
– any derivative works created from these components
13.1.2. The User acknowledges that using the Service does not transfer any intellectual property rights other than the limited license specified in Section 12.

13.2. Protected Elements
 13.2.1. All information accessible through the Service, including:
– lessons, courses, modules, grammar explanations
– tests, quizzes, flashcards, exercises
– video, audio, animations
– AI recommendations and explanations
– structure and arrangement of materials
– methods and logic used to deliver learning content
is protected under U.S. law and international copyright, related rights law, patent law, trademark law, and trade secret regulations.

13.3. Prohibited User Actions
 The User is prohibited from:
13.3.1. copying, publishing, distributing, transmitting, selling, or using elements of the Service (including AI content) outside personal educational use
13.3.2. creating derivative materials or services based on LingTrio content
13.3.3. using Service elements for commercial courses, teaching, or third-party work without written permission from the Company
13.3.4. decompiling, analyzing, disassembling, or attempting to access the source code, algorithms, models, or databases
13.3.5. bypassing protections, modifying the Service, or interfering with it using technical means
13.3.6. scraping, mass downloading, or automated collection of materials
13.3.7. uploading content that violates third-party copyright

13.4. AI-Generated Content as Intellectual Property
 13.4.1. AI-generated content within the Service is created using algorithms and tools owned by the Company or its partners.
13.4.2. The User receives a limited right to use AI-generated content only within the Service.
13.4.3. Mass usage, external publication, or commercial exploitation of AI content is prohibited without written permission from the Company.

13.5. Trademarks and Branding
 13.5.1. The name "LingTrio", its logos, graphic elements, and brand identity are trademarks of the Company.
13.5.2. Any use of these trademarks without the Company’s consent is prohibited.
13.5.3. The User may not register similar brands, domain names, or products that could cause confusion with LingTrio.

13.6. Rights Violations
 13.6.1. In case of intellectual property violations, the Company may:
– block the Account
– restrict Service access
– demand compensation for damages
– initiate legal proceedings under U.S. law
13.6.2. The User is liable for all damages caused to the Company or third parties due to intellectual property violations.

14. Prohibited Actions
 Violation of this section may result in immediate account blocking, restricted access, data deletion, and potential legal liability.

14.1. Technical Violations
 The User is prohibited from:
14.1.1. attempting to gain unauthorized access to the Service, servers, databases, or internal APIs
14.1.2. bypassing technical restrictions, security systems, limits, tokens, filters, or protection mechanisms
14.1.3. modifying, hacking, interfering with the Service, or using tools to alter its behavior
14.1.4. using automated programs, scripts, bots, parsers, spiders, emulators, or tools imitating User actions
14.1.5. sending excessive or abnormal requests that overload the infrastructure
14.1.6. taking actions that may damage, disrupt, or slow down the Service

14.2. Intellectual Property Violations
 The User is prohibited from:
14.2.1. copying, distributing, publishing, or transmitting Service materials without authorization
14.2.2. using LingTrio content (lessons, texts, audio, video, AI outputs) outside personal educational use
14.2.3. creating derivative products or services based on LingTrio materials
14.2.4. decompiling, disassembling, or attempting to extract source code, algorithms, or architecture
14.2.5. collecting or extracting information about the structure of databases, content, tests, lessons, or internal tools

14.3. Improper Use of AI
 The User must not:
14.3.1. use AI features to create illegal, dangerous, harmful, or offensive content
14.3.2. use AI to impersonate third parties, misrepresent identity, or produce falsified materials
14.3.3. create excessive AI requests to abuse token or limit systems
14.3.4. use AI-generated content for commercial purposes without Company permission
14.3.5. attempt to interfere with AI model logic, test weaknesses, or engage in model exploitation

14.4. Abuse of the Service
 Prohibited actions include:
14.4.1. registering multiple Accounts to bypass trials, limits, or token restrictions
14.4.2. selling or transferring one’s Account
14.4.3. engaging in fraudulent activities, including using stolen data, cards, or accounts
14.4.4. impersonating LingTrio representatives, Company employees, or partners
14.4.5. using the Service for spam, advertising, or mass messaging

14.5. Prohibited Content
 The User must not upload, create, or distribute content that:
14.5.1. violates U.S. law or local laws
14.5.2. contains insults, threats, discrimination, or hate speech
14.5.3. includes pornography, sexual content, or violence
14.5.4. contains political propaganda, extremist materials
14.5.5. includes personal data of third parties without consent
14.5.6. violates copyright or related rights
14.5.7. contains malware, viruses, code, or harmful files

14.6. Actions Affecting Service Stability
 The User is prohibited from:
14.6.1. performing actions that may cause failures, errors, or instability of the Service
14.6.2. interfering with security or monitoring systems
14.6.3. attempting to measure performance, analyze structure, or test vulnerabilities without authorization

14.7. Breach of Conditions
 14.7.1. In case of violation, the Company may:
– restrict functionality
– block the Account
– delete data
– deny future access
– seek compensation for damages
14.7.2. The User is responsible for all consequences of violating these rules.

15. Moderation, Account Blocking, and Account Deletion
 15.1. Company’s Right to Moderate
 15.1.1. The Company moderates the Service to ensure safety, compliance with the law, and consistent quality of operation.
15.1.2. The Company may monitor User activity, including:
– account activity
– number and nature of AI requests
– uploaded content
– attempts to bypass restrictions
– technical behavior indicators
15.1.3. Moderation may be automated, manual, or a combination of both.
15.1.4. The User agrees that moderation is an integral part of the Service.

15.2. Grounds for Blocking or Restricting an Account
 The Company may temporarily or permanently restrict a User’s access to the Service, including blocking the Account, if:
15.2.1. the User violated this Agreement
15.2.2. the User performed prohibited actions described in Section 14
15.2.3. suspicious activity is detected, including but not limited to:
– abnormal AI requests
– automated use of the Service
– sudden spikes in workload
– attempts to attack infrastructure
15.2.4. the User engaged in fraud or attempted to misuse payment systems, subscriptions, or tokens
15.2.5. the User provided false information during registration or verification
15.2.6. complaints were received from other Users or third parties
15.2.7. the content posted by the User violates the law, third-party rights, or this Agreement
15.2.8. the User’s actions may cause harm to the Company, the Service, other Users, or the infrastructure
15.2.9. compliance with legal requirements, court orders, or government requests is necessary

15.3. Measures the Company May Take
 Depending on the violation, the Company may:
15.3.1. restrict access to certain Service features
15.3.2. temporarily block the Account
15.3.3. impose additional limits on AI or token usage
15.3.4. block creation of new Accounts using the same data
15.3.5. delete or hide any User Content
15.3.6. permanently delete the Account with no possibility of recovery
15.3.7. block the User’s access to the Service in the future
15.3.8. seek compensation for damages

15.4. Notification of Blocking
 15.4.1. The Company may, but is not obligated to, notify the User regarding:
– the reasons for blocking
– the nature of the violations
– the duration of restrictions
15.4.2. In cases of security threats or violations of law, the Company may block an Account immediately without notice.

15.5. Account Deletion Requested by the User
 15.5.1. The User may delete their Account through the Service settings.
15.5.2. Account deletion is final. User data, including learning progress, tokens, AI history, materials, and settings, cannot be restored.
15.5.3. Account deletion does not relieve the User of payment obligations for transactions already completed.

15.6. Account Deletion Initiated by the Company
 15.6.1. The Company may delete a User’s Account in cases of:
– severe or repeated violations of this Agreement
– prolonged inactivity (duration determined by the Company)
– fraud or attempted hacking
– legal or regulatory obligations
15.6.2. The Company may retain certain data after Account deletion when required by law, security, or technical needs.

15.7. Consequences of Blocking or Deletion
 15.7.1. The User loses access to all data, materials, tokens, and Service features.
15.7.2. No refunds are provided upon blocking or deletion of an Account.
15.7.3. The Company is not liable for any losses arising from blocking or deleting the Account.

16. Liability of the Parties and Disclaimer of Warranties
 16.1. General Provisions
 16.1.1. The User uses the Service at their own risk.
The Company provides the Service “as is” and “as available,” without any express or implied warranties.
16.1.2. The Company does not guarantee:
– uninterrupted or error-free operation of the Service
– compatibility with the User’s devices
– achievement of specific educational results
– completeness, accuracy, or correctness of AI-generated content
– continuous availability of all features
– absence of technical failures
– preservation of data in case of technical issues caused by external factors

16.2. Company’s Liability Is Limited to the Maximum Extent Permitted by Law
 16.2.1. The Company is not liable for:
– any indirect, incidental, special, punitive, or consequential damages
– loss of data, tokens, progress, time, profit, or opportunities
– improper use of content, including AI-generated content
– consequences of technical failures caused by the User’s equipment, internet connection, blocks, or payment system failures
– harm caused by third parties, including hosting providers, app stores, and API vendors
16.2.2. The Company is not liable for User Content or its use by third parties.
16.2.3. The Company is not liable for:
– Account deletion
– loss of access due to Agreement violations
– loss of access to features resulting from lack of subscription
– restrictions imposed by U.S. law or the User’s local laws

16.3. Maximum Company Liability
 16.3.1. The maximum aggregate liability of the Company for any claims during the entire period of Service use is limited to the total amount actually paid by the User to the Company over the last 12 months.
16.3.2. If the User has made no payments in the past 12 months, the maximum liability of the Company is 1 (one) U.S. dollar.
16.3.3. This limitation applies to all types of claims, including contractual, tort, and other legal claims.

16.4. Artificial Intelligence and Lack of Guarantees
 16.4.1. The User understands and agrees that AI models may:
– make mistakes
– provide inaccurate, contradictory, or incomplete data
– generate recommendations requiring critical evaluation
– operate with delays, limitations, or interruptions
16.4.2. The Company does not guarantee the accuracy, reliability, or correctness of AI content.
16.4.3. The User independently evaluates AI responses and makes decisions based on them.
16.4.4. The User fully accepts the risks associated with using AI.

16.5. User Liability
 16.5.1. The User is responsible for any violation of this Agreement and for all consequences of their actions within the Service.
16.5.2. The User is responsible for:
– the content they upload or generate
– the security of their login data
– the legality of their actions
– compliance with age requirements
– the use of AI-generated materials

16.6. Warranty Limitations
 16.6.1. All implied warranties, including warranties of fitness for a particular purpose, merchantability, and non-infringement, are expressly excluded.
16.6.2. The Company does not provide warranties regarding:
– educational results
– quality or level of language proficiency
– effectiveness of learning
– compliance with User expectations

17. Limitation of Liability (Extended Section)
 17.1. Scope of Liability Limitations
 17.1.1. The Company is not liable for any damages arising from:
– the use or inability to use the Service
– User errors
– misinterpretation of AI-generated content
– the operation of third-party services required for the Service to function
17.1.2. The Company is not liable for actions of third parties, including:
– app stores (Apple, Google)
– mobile network operators
– internet service providers
– payment systems (Stripe, Payture, Apple Pay, Google Pay, banks)
– hosting providers and cloud platforms
– providers of artificial intelligence models
17.1.3. The Company is not liable for loss or damage of User data if caused by:
– equipment or network failures on the User’s side
– errors in third-party software
– unstable internet connection
– actions of the User or third parties

17.2. Force Majeure
 17.2.1. The Company is not liable for failure to fulfill obligations due to force majeure events, including but not limited to:
– natural disasters
– fires, floods, earthquakes
– war, terrorism, civil unrest
– strikes, power outages, network failures
– global technological or cyber incidents
– changes in legislation or governmental restrictions
– large-scale internet or data-center outages
17.2.2. In such cases, the Company’s obligations are suspended for the duration of the force majeure event.

17.3. Educational Limitations
 17.3.1. The User understands that LingTrio is a supplemental learning tool, not a professional educational program.
17.3.2. The Company does not guarantee the User will achieve:
– a specific level of language proficiency
– success in exams or tests
– professional or career outcomes
– compliance of learning materials with academic standards of specific countries
17.3.3. Any recommendations or explanations provided by AI do not constitute professional or expert advice.

17.4. Limitation of Liability for User Content
 17.4.1. The Company is not liable for User Content uploaded, entered, or created within the Service.
17.4.2. The Company is not obligated to:
– review such content
– verify its accuracy
– ensure its preservation
– restore it after deletion or failure

17.5. Limitation of Liability for AI Performance
 17.5.1. AI features may:
– operate with delays
– be unavailable under high load
– provide inaccurate or incorrect answers
– fail to meet User expectations
17.5.2. The Company is not liable for:
– consequences based on AI recommendations
– data processing errors
– inaccuracies in generated content
– incompatibility of AI features with the User’s devices

17.6. Additional Exclusions
 17.6.1. The Company is not liable for:
– loss of tokens
– subscription expiration
– account blocking due to Agreement violations
– inability to use certain features due to geographic restrictions
– incompatibility with outdated devices or browsers
– restrictions imposed by U.S. or foreign laws
17.6.2. The Company does not provide medical, legal, psychological, linguistic, or other professional consultations through AI or learning materials.

17.7. Application of Limitations
 17.7.1. All liability limitations apply to the fullest extent permitted under U.S. (Florida) law and applicable international standards.
17.7.2. If any limitation is deemed invalid, the remaining provisions remain in force.

18. Privacy and Personal Data Processing
 18.1. General Provisions
 18.1.1. The Company processes the User’s personal data in accordance with this Agreement, Section 23 “Personal Data Processing and Privacy Policy,” and applicable laws including GDPR, COPPA, and other mandatory regulations.
18.1.2. By using the Service, the User confirms they have read the Privacy Policy (Section 23) and agree to the data processing procedures.
18.1.3. Data processing is carried out fairly, lawfully, transparently, and only to the extent necessary for the Service to function.

18.2. Categories of Data
 18.2.1. Technical data:
– IP address, device information, OS, app version, crash reports, settings
18.2.2. Account data:
– name/username, email, authentication hash, language preferences
18.2.3. Learning data:
– progress, tests, saved words, statistics, interactions with AI
18.2.4. User Content:
– entered phrases, audio, messages in dialogues, exercise answers
18.2.5. Payment data:
– transaction identifier, subscription status
(bank card data is processed by Apple/Google/Stripe/Payture and not stored by the Company)

18.3. Purposes of Processing
 (Aligned with Section 23)
The Company processes data to:
– provide access to the Service
– personalize learning
– operate AI features
– perform analytics and improvements
– ensure security
– comply with legal obligations

18.4. Data Transfer to Third Parties
 Data may be shared with:
– cloud providers
– payment systems
– AI providers (strictly for request processing)
– analytics systems (only with consent)
– government authorities as required by law
All providers follow data protection requirements.

18.5. Data Storage and Security
 18.5.1. Data is stored only as long as necessary for the Service to operate or as required by law.
18.5.2. The Company uses encryption, access control, security monitoring, and other technical measures to protect data.

18.6. User Rights
 The User has the right to:
– access their data
– correct their data
– delete their Account
– restrict processing
– withdraw consent
– request information about processing
(A full description of User rights is provided in Section 23.)

19. Cookies and Analytics Tools
 19.1. General Provisions
 19.1.1. To ensure the operation of the Service, improve its efficiency, personalize content, and analyze User behavior, the Company uses cookies and similar technologies.
19.1.2. By using the Service, the User confirms their consent to the use of cookies and analytics tools as described in this Agreement and the Privacy Policy.

19.2. Types of Cookies Used
 The Company may use the following categories of cookies:

19.2.1. Functional Cookies
 Required for proper operation of the Service:
– authentication
– saving settings
– maintaining sessions
– interface functionality

19.2.2. Analytical and Statistical Cookies
 Used to analyze:
– user behavior
– traffic
– errors and technical issues
– performance of lessons and AI
Tools such as Google Analytics, Firebase, Amplitude, and others may be used.

19.2.3. Personalization Cookies
 Used for:
– lesson recommendations
– content optimization
– improving user experience

19.2.4. Advertising Cookies
 Used in the free version of the Service to display relevant ads, if supported by the functionality.

19.3. Use of SDKs, Pixels, and Similar Technologies
 In addition to cookies, the Company may use:
– SDKs (e.g., Firebase SDK)
– tracking pixels
– local storage
– attribution tools
– device identifiers
These technologies help analyze app usage and ensure stable operation.

19.4. Cookie Management and Opt-Out
 19.4.1. The User may limit or disable cookie usage through browser or device settings.
19.4.2. Disabling cookies may result in partial or full loss of Service functionality.
19.4.3. Some cookies are essential to the Service and cannot be disabled technically.

19.5. Third-Party Cookies
 19.5.1. Certain cookies may be placed by third-party services integrated into the Service, including:
– Google
– Apple
– Stripe
– Payture
– analytics platforms
– advertising networks (if applicable)
19.5.2. The Company is not responsible for third-party cookie policies.

19.6. User Consent
 By using the Service, the User:
19.6.1. agrees to the use of cookies and analytics technologies
19.6.2. acknowledges that cookie usage may be disabled
19.6.3. understands that disabling cookies may limit access to functionality

20. AI Integrations and Legal Limitations
 20.1. Use of Artificial Intelligence Technologies
 20.1.1. The LingTrio Service uses artificial intelligence (AI) technologies provided by the Company and third-party vendors, including but not limited to API providers for text, audio, image processing, and data analysis.
20.1.2. AI is used for:
– generating learning content
– explaining grammar and rules
– analyzing User answers
– correcting errors
– creating dialogues and examples
– practicing conversation skills
– supporting learning features

20.2. Nature and Limitations of AI Content
 20.2.1. AI-generated results are produced automatically and may contain:
– inaccuracies
– grammatical mistakes
– contradictory or outdated information
– incorrect recommendations
– content that does not meet User expectations
20.2.2. The Company does not guarantee:
– accuracy, reliability, or completeness of AI-generated information
– compliance of AI content with educational standards
– suitability of AI content for professional or examination purposes
20.2.3. The User understands and accepts that AI responses may be unpredictable.

20.3. User Responsibility When Using AI
 The User agrees that:
20.3.1. they bear full responsibility for any use of AI-generated content
20.3.2. they independently evaluate the accuracy and appropriateness of AI recommendations
20.3.3. they do not use AI content for:
– legal, medical, financial, or other professional advice
– decisions requiring qualified expertise
– actions that could harm third parties
20.3.4. Any conclusions the User makes based on AI-generated content are made at their own risk.

20.4. Restrictions on AI Usage
 The User is prohibited from:
20.4.1. using AI to create illegal, harmful, extremist, offensive, or dangerous content
20.4.2. generating content that violates third-party rights or legal standards
20.4.3. using AI to impersonate individuals, create falsifications, or manipulate others
20.4.4. using AI features for automated mass request generation
20.4.5. attempting to interfere with AI operation, analyze vulnerabilities, or bypass limitations

20.5. Transfer of Data to AI Providers
 20.5.1. To process User requests, certain data may be transferred to third-party AI infrastructure providers.
20.5.2. Transferred data may include text, audio, requests, test results, and technical information necessary for processing.
20.5.3. AI providers process data according to their own privacy policies, and the User agrees to such processing.
20.5.4. The Company is not liable for actions or errors of third-party AI systems.

20.6. Legal Restrictions on AI Usage
 20.6.1. AI features may be unavailable in certain countries due to:
– U.S. export control
– sanctions
– legal requirements
– app store restrictions
20.6.2. The Company may restrict or terminate AI access in any jurisdiction without prior notice.

20.7. Disclaimer of Liability
 20.7.1. The Company is not liable for any damage resulting from:
– use or misinterpretation of AI-generated content
– AI feature failures
– system errors related to AI providers
– changes in AI model behavior
– limitations or suspension of AI capabilities
20.7.2. AI tools are provided “as is” and may operate inconsistently.

21. Data Security and Backups
 21.1. Security Measures
 21.1.1. The Company takes technically and organizationally reasonable measures to protect User data from:
– unauthorized access
– loss
– alteration
– destruction
– disclosure
21.1.2. Security measures include:
– data encryption during transmission and storage (where applicable)
– access control and permission verification
– monitoring systems
– data isolation
– infrastructure backups and disaster recovery procedures
21.1.3. Despite implemented measures, the Company cannot guarantee absolute data protection from threats such as malicious actors, system failures, cyberattacks, or force majeure.

21.2. User Responsibility for Security
 21.2.1. The User is responsible for securing their login credentials, devices, and network connection used to access the Service.
21.2.2. The Company is not liable for data loss or unauthorized access resulting from:
– weak passwords
– sharing access with third parties
– malware on the User’s device
– use of insecure networks
– violation of security rules by the User

21.3. Data Backups
 21.3.1. The Company may perform backups of Service data to maintain stability and restore functionality in case of technical failures.
21.3.2. Backups are performed in volumes and schedules determined by the Company and may not include:
– AI conversation history
– tokens
– recent statistics
– lesson progress
– data deleted by the User
– data deemed outdated
21.3.3. The Company does not guarantee:
– restoration of any specific data item
– preservation of data if storage devices are damaged
– complete consistency of restored data with the current Account state

21.4. Data Retention After Account Deletion
 21.4.1. After Account deletion, User data is deleted, anonymized, or retained only as legally required.
21.4.2. The Company is not required to retain:
– learning progress
– tokens
– AI history
– files uploaded by the User
– payment history (except legally required documents)
21.4.3. Deleted Accounts and associated data cannot be restored.

21.5. System Behavior During Failures and Outages
 21.5.1. In the event of technical failures, server outages, or third-party system issues, the Company will make reasonable efforts to restore Service operation.
21.5.2. The Company is not liable for:
– data loss resulting from such failures
– inability to perform operations due to infrastructure downtime
– consequences of errors by hosting providers, AI vendors, or payment systems

21.6. Infrastructure Independence
 21.6.1. The Service may rely on third-party cloud and server platforms.
21.6.2. The User agrees that data may be temporarily stored or processed in different countries according to the providers’ infrastructure architecture.
21.6.3. The Company is not liable for outages or delays caused by these providers.

22. Amendments to the User Agreement
 22.1. Company’s right to amend the terms
22.1.1. The Company may unilaterally amend, supplement, update, or revise this Agreement at any time.
22.1.2. Amendments may concern any sections, including:
– use of the Service
– payment rules and subscriptions
– restrictions and licenses
– AI functionality
– data processing
– rights and obligations of the parties
22.1.3. The updated version of the Agreement becomes effective when published in the Service or on the Company’s official website, unless otherwise specified.

22.2. User notification
22.2.1. The Company may notify the User of amendments through:
– in-app notifications
– email
– publication on the website
– system messages
22.2.2. The User is responsible for monitoring updates.
22.2.3. Continued use of the Service after amendments take effect constitutes full and unconditional acceptance of the updated Agreement.

22.3. User disagreement with amendments
22.3.1. If the User does not agree with the updated Agreement, they must stop using the Service and delete their Account.
22.3.2. Continued use of the Service is deemed acceptance of the new terms.

22.4. Current version of the Agreement
22.4.1. The current version of the Agreement is always available in the Service and/or on the Company’s official website.
22.4.2. The Company is not required to store or provide previous versions unless required by law.

23. Personal Data Processing and Privacy Policy
 23.1. General provisions
23.1.1. The Company processes Users’ personal data in accordance with:
– the EU General Data Protection Regulation (GDPR, Regulation 2016/679)
– the laws of the User’s country of residence
– Apple App Store and Google Play requirements
– this User Agreement
23.1.2. Use of the Service constitutes the User’s consent to this Privacy Policy.
23.1.3. Personal data is processed fairly, lawfully, transparently, and only to the extent necessary for providing the Service.

23.2. Data collected
The Service may process the following categories of data:
23.2.1. Registration data: email, name (if provided), password, language, country.
23.2.2. Learning data: vocabulary, progress, exercises, tests, results, added words.
23.2.3. AI data: queries, AI responses, dialogue history, corrections, materials created by the User.
23.2.4. Technical data: IP address, device type, OS version, app identifiers, cookies, telemetry.
23.2.5. Payment data: processed only by Apple, Google, Stripe, Payture; the Company does not store card data.
23.2.6. Support data: support requests and email communications.

23.3. Purpose of processing
Data is processed for:
– providing access to the Service and the Account
– fulfilling the contract (subscriptions and paid features)
– learning, progress analysis, AI content generation
– security and abuse prevention
– support and communication with the User
– analytics and Service improvement
– compliance with legal obligations
The Company does not use data for purposes incompatible with these.

23.4. Legal basis
23.4.1. Contract (Art. 6(1)(b) GDPR): provision of the Service and features.
23.4.2. User consent (Art. 6(1)(a)): analytics, personalization, marketing.
23.4.3. Legitimate interest (Art. 6(1)(f)): Service protection and fraud prevention.
23.4.4. Legal obligation (Art. 6(1)(c)): accounting, data retention, regulatory compliance.

23.5. Transfer of data to third parties
Data may be transferred to:
– cloud service providers
– payment systems (Apple, Google, Stripe, Payture)
– AI providers (e.g., OpenAI) for request processing
– analytics services (only with User consent)
– government authorities when required by law
All providers must comply with data protection standards and sign a Data Processing Agreement (DPA) with the Company.

23.6. International data transfer
23.6.1. Data may be processed on servers located in the USA, the EU, or other countries where providers operate.
23.6.2. Transfers rely on:
– Standard Contractual Clauses (SCC)
– additional safeguards (encryption, pseudonymization)
– assessment of provider compliance with GDPR
23.6.3. Data is not transferred to countries without adequate protection unless legal safeguards are in place.

23.7. User rights
The User has the right to:
– access their data
– rectify data
– delete data (“right to be forgotten”)
– restrict processing
– data portability
– withdraw consent
– object to processing
– lodge a complaint with a supervisory authority
Requests should be directed to: info@lingtrio.com.

23.8. Data retention
23.8.1. Data is retained while the Account is active, as required to fulfill the contract, or as required by law.
23.8.2. After Account deletion, data is deleted or anonymized unless legal retention is required.

23.9. COPPA compliance
23.9.1. The Service is not intended for children under 13 in accordance with COPPA.
The Company does not knowingly collect personal data from children under 13.
If the Company becomes aware that an Account was created by a child under 13 without verifiable parental consent, the Account will be deleted and data erased.

23.9.2. Age verification
The User confirms their age at registration.
Minimum ages:
– 13 for the USA (COPPA)
– 16 for the EU (GDPR Art. 8), unless a country sets a lower age
The Company may request proof of age or parental consent.

23.9.3. Parental consent
If the User is below the required age, Account creation is allowed only with verifiable parental consent.
The Company may request documents, electronic confirmation, or block/delete the Account if consent is not provided.

23.9.4. Violation of age requirements
If the Company discovers that a child under the required age is using the Service without consent:
– the Account will be suspended or deleted
– data will be erased in accordance with COPPA and GDPR
– parents or guardians will be notified when possible

23.10. Data protection measures
The Company applies:
– encryption during transmission and storage
– access control based on least privilege
– security monitoring
– data leakage protection
– organizational and technical safeguards

24. Governing Law and Dispute Resolution
 24.1. Governing law
24.1.1. For Users who are natural persons (consumers), this Agreement is governed by the laws of the User’s country of residence. This provision complies with mandatory consumer protection rules in the EU, the United Kingdom, France, the Russian Federation, and other jurisdictions protecting consumer rights.
24.1.2. For corporate clients, legal entities, and individual entrepreneurs, this Agreement is governed by the laws of the United States of America and the State of Florida.

24.2. Jurisdiction and venue
24.2.1. Consumers are entitled to bring claims and protect their rights before the courts of their country of residence. The Company does not limit or exclude this right.
24.2.2. For corporate clients, all disputes shall be resolved by the courts of the State of Florida, USA, unless otherwise agreed by the parties separately.

24.3. Pre-trial dispute resolution
24.3.1. Before filing a lawsuit, the User shall send a written claim to the Company using the contact details specified in Section 25.
24.3.2. The Company reviews such claims within 30 calendar days.

24.4. Arbitration
24.4.1. For corporate clients, the Company may, at its discretion, submit a dispute to arbitration in accordance with the rules of the American Arbitration Association (AAA).
24.4.2. Arbitration is conducted in the State of Florida and is binding only if both parties agree.

24.5. Class actions
24.5.1. Limitations on class actions apply only to corporate clients. Consumers are not deprived of any rights granted by the laws of their country of residence.

24.6. International jurisdiction
24.6.1. If a User files a claim in a jurisdiction that does not comply with this section, the Company may petition for transfer of the case to a court with proper jurisdiction, except where mandatory consumer protection rules in the User’s country of residence provide otherwise.

25. Miscellaneous and Contact Information
 25.1. Company contact information
25.1.1. The Company providing access to the Service is:
Lingtrio LLC
7901 4TH ST N, STE 27104
St. Petersburg, FL 33702
United States of America
25.1.2. The Company’s official contact email address is:
info@lingtrio.com
25.1.3. The Company’s Registered Agent:
Registered Agents Inc
7901 4TH ST N, STE 300
St. Petersburg, FL 33702
United States of America
25.1.4. Legal notices, claims, and requests shall be sent to the email address specified in clause 25.1.2 or through other channels indicated on the Company’s official website.

25.2. No partnership or agency
25.2.1. Nothing in this Agreement shall be construed as establishing a joint venture, partnership, employment, or agency relationship between the User and the Company.

25.3. Severability
25.3.1. If any provision of this Agreement is found to be invalid or unenforceable, this does not affect the validity of the remaining provisions.
25.3.2. Any invalid provision shall be deemed replaced by a valid provision that most closely reflects its meaning and legal effect.

25.4. Non-assignment by the User
25.4.1. The User may not assign their rights or obligations under this Agreement to third parties without the Company’s written consent.
25.4.2. The Company may assign its rights and obligations to third parties as part of a corporate reorganization, business transfer, or other lawful transaction.

25.5. Electronic form of the Agreement
25.5.1. The User agrees that the electronic form of this Agreement has the same legal force as a written (paper) document.
25.5.2. Use of the Service constitutes full and unconditional acceptance of the terms of this Agreement.

25.6. Entire agreement
25.6.1. This Agreement constitutes the entire agreement between the User and the Company regarding the use of the Service and supersedes all prior oral or written arrangements.