Terms of Service

1. Acceptance of Terms

By accessing or using AtoC.ai, you acknowledge that you have read, understood, and agree to be bound by these Terms of Service and our Privacy Policy, Cookie Policy, and Data Safety disclosures. If you do not agree, you must not access or use the service. These Terms together with the Privacy Policy and other referenced documents constitute the agreement between you and us.

2. Definitions

• "We", "Us", "Our", "AtoC.ai" — Maksim Golitsyn, the operator of the AtoC.ai service.
• "You", "Your" — the user of the AtoC.ai mobile application, website, or related services.
• "App" — the AtoC.ai mobile application distributed via Apple App Store and Google Play.
• "Service" — the App, the website at atoc.ai, the web application at app.atoc.ai, backend APIs, and any related functionality.
• "Store Operators" — Apple Inc. (App Store) and Google LLC (Google Play).
• "Payment Processor" — Paddle.com Limited, acting as Merchant of Record for purchases made through the web application at app.atoc.ai, and the Store Operators for purchases made through the App.
• "User Content" — any content you submit, including feedback, vocabulary/grammar prompts, custom sets, and dialogue messages.
• "AI Features" — AI-generated grammar content and content generation tools.
• "Subscription" — a paid premium plan with expanded features and limits.
• "Regional Servers" — planned infrastructure in the Middle East, India, and Asia for data localization where required by law.

3. Conditions for Use

To use the Service you must:

• be at least 13 years old, or the applicable age of digital consent in your jurisdiction, whichever is higher;
• provide accurate and complete registration information;
• have obtained verifiable parental consent where required by law;
• have a compatible device and internet connection.

4. User Account

You are responsible for maintaining the confidentiality of your account credentials and for all activity under your account. You must provide accurate information when registering. We may suspend or terminate accounts that violate these Terms or engage in fraudulent, abusive, or illegal activity.

5. Subscription & Payment

Premium subscriptions are billed through the Apple App Store or Google Play for purchases made in the App, or through our Payment Processor Paddle.com Limited for purchases made through the web application at app.atoc.ai. For web purchases, Paddle.com Limited acts as the Merchant of Record and is the seller of record for the transaction. Subscriptions auto-renew until cancelled by you in the relevant store account settings (App) or in your account at app.atoc.ai / via Paddle (web). Premium features and limits are set at our discretion and may include expanded AI credits and enhanced limits.

All purchases are final except where required by applicable consumer protection law. Refund requests for App purchases must be directed to the Store Operator where the purchase was made; refund requests for web purchases must be directed to Paddle. We do not process direct refunds. Promotional codes, gifts, and bonuses may be issued or withdrawn at our discretion.

Promotional and regional benefits. We may, at our sole discretion, offer promotional benefits, bonus credits, special pricing, or extended access to users in certain regions or under certain conditions. Such offers are not contractual commitments, do not constitute a permanent entitlement, and may be modified, restricted, or revoked at any time without prior notice. The availability, scope, and duration of any such benefit are determined solely by us and may differ between users, regions, and time periods.

6. License & Restrictions

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to access and use the Service for personal, non-commercial purposes. You may not:

• copy, modify, distribute, reverse-engineer, decompile, or create derivative works of the App or Service;
• use automated means to access, scrape, or circumvent security measures;
• use the Service for competitive analysis or to develop a competing product;
• upload harmful code, spam, or content that infringes third-party rights;
• use the Service in any manner that violates applicable law.

All content, software, trademarks, and materials provided by AtoC.ai are owned by Maksim Golitsyn or licensed to us. All rights not expressly granted are reserved.

7. User Content

By submitting User Content to the Service, you grant us a worldwide, royalty-free, perpetual, irrevocable, non-exclusive, sublicensable license to use, reproduce, modify, adapt, publish, and distribute that content for the purpose of operating and improving the Service. You represent that you own or have the necessary rights to any content you submit and that it does not infringe third-party rights or violate applicable law.

We reserve the right to remove or restrict User Content that violates our Terms, Community Guidelines, or applicable law. We are not obligated to monitor User Content but may do so at our discretion.

8. AI-Generated Content

Current: Parts of the AtoC.ai educational catalog are generated by artificial intelligence and are clearly labeled with an "AI" badge in the app. This includes:

• Grammar exercises — flagged per exercise via the isAIGenerated marker returned by the backend.
• Grammar rules and explanations — all grammar rules in the catalog are AI-generated and labeled as such on the rule screen.
• Word details — system words and words copied from system sets display an "AI" badge on the word details card; the progressive AI context section is also AI-generated.

AI-generated content may contain errors, inaccuracies, or outdated information. It does not replace professional linguistic instruction. Each piece of AI-generated content in the app is accompanied by a report button so you can flag mistakes for our moderation team. Priority display is given to teacher-verified material.

9. Analytics & Advertising

We use internal analytics, Sentry error monitoring, and third-party product-analytics services: Firebase Analytics, Crashlytics, AppsFlyer, and Amplitude. Third-party analytics SDKs are active only after user consent (EU/EEA requires explicit consent; other regions may be enabled by default with opt-out). Crashlytics and AppsFlyer attribution are always active for error monitoring and install attribution.

Advertising is delivered via Google Mobile Ads (AdMob). Ad personalization is only activated after explicit consent (EU/EEA) and is disabled by default for Russian users. For more details, see our Privacy Policy and Cookie Policy.

10. Changes to the Service and Terms

We reserve the right to modify, suspend, or discontinue any part of the Service at any time, including Charge (Energy) rules, gifts, bonuses, features, and subscription pricing. We may revise these Terms at any time. Material changes to these Terms will be posted on the website and, where practical, communicated through the app or by email for at least 7 days before taking effect. Continued use of the Service after changes constitutes acceptance of the revised Terms.

11. Store Operator Provisions

These Terms are between you and AtoC.ai, not with any Store Operator. The Store Operators are third-party beneficiaries of these Terms and have the right to enforce them against you. The Store Operators are not responsible for the App or its content, maintenance, or support. Any claims regarding the App, including product liability, failure to conform to legal requirements, or intellectual property infringement, must be directed to AtoC.ai, not to the Store Operator. You must comply with all applicable third-party terms when using the App.

For purchases made through the web application at app.atoc.ai, Paddle.com Limited is the Merchant of Record and the seller of record. Paddle is responsible for billing, tax collection and remittance, and refund processing for such web purchases. Paddle's terms of sale and privacy policy apply to web transactions to the extent required by law.

12. Termination & Suspension

We may suspend or terminate your access to the Service at any time, with or without notice, for any reason, including breach of these Terms. Upon termination, your right to use the Service ceases immediately. Provisions relating to intellectual property, liability, and dispute resolution survive termination.

13. Disclaimer of Warranties

The Service is provided "as is" and "as available" without warranties of any kind, whether express, implied, or statutory. We do not warrant that the Service will be uninterrupted, error-free, secure, or free of viruses or other harmful components. Learning outcomes are not guaranteed.

14. Limitation of Liability

To the maximum extent permitted by applicable law, AtoC.ai and its operator shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including lost profits, data loss, or business interruption, arising out of or in connection with your use of the Service. Our total aggregate liability shall not exceed the amount you paid for the Service in the 12 months preceding the claim.

16. Governing Law & Dispute Resolution

For EU/EEA consumers: disputes shall be resolved in the competent courts of your jurisdiction of residence, and EU consumer protection law applies.

For all other users: these Terms shall be governed by and construed in accordance with the laws of the Republic of Türkiye, without regard to conflict of law principles. Any dispute shall first be attempted to be resolved through good-faith negotiation. If unresolved, disputes shall be submitted to the competent courts of Mersin, Türkiye.

17. No Class Actions

You agree to bring any claims against us only in your individual capacity, and not as a plaintiff or class member in any purported class, consolidated, or representative proceeding. Class arbitrations, class actions, private attorney general actions, and consolidation with other arbitrations are not permitted.

18. Contact

For questions about these Terms, please contact us at contact support.