Terms of Service

1. Acceptance of Terms

By creating an account, downloading the VocabFlow mobile application, or otherwise accessing or using VocabFlow (collectively, the "Service"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree, do not use the Service.

These Terms constitute a legally binding agreement between you ("User", "you") and VocabFlow ("we", "us", "our").

2. Who We Are

VocabFlow is a vocabulary learning platform developed and operated by Anatolii Krotov. For questions about these Terms, contact us at anatolii.krotov@gmail.com.

3. Service Description

VocabFlow provides a vocabulary learning platform that includes:

• Spaced repetition flashcards powered by the FSRS algorithm to optimize your learning schedule.
• AI-generated word content — definitions, example sentences, and pronunciation hints generated with the assistance of AI.
• Progress tracking and statistics — insights into your learning sessions and retention rates.
• Multi-language support — learn vocabulary across multiple language pairs.

The Service is available as a mobile application (iOS and Android) and may include web-based components.

4. Eligibility

You must be at least 16 years old to create an account and use the Service. If you are between 16 and 18, you confirm that you have obtained parental or guardian consent where required by applicable law. We do not knowingly collect personal data from children under 16.

5. Account Registration and Security

You may create a VocabFlow account using:

• Email and password — registered directly with VocabFlow.
• Sign in with Apple — using your Apple ID.
• Sign in with Google — using your Google account.

Regardless of the method chosen:

• You must provide accurate and complete information when creating an account.
• You are responsible for maintaining the confidentiality of your login credentials (or the security of your Apple/Google account if using social login).
• You are responsible for all activity that occurs under your account.
• You must notify us immediately at anatolii.krotov@gmail.com if you suspect unauthorized access to your account.
• We reserve the right to refuse registration or cancel accounts at our discretion.

Social login note: When you use Sign in with Apple or Sign in with Google, your authentication is handled by Apple or Google respectively under their own terms of service. We receive only the minimum data needed to create or identify your account (see our Privacy Policy §3.2). You can revoke VocabFlow's access in your Apple ID or Google account settings at any time; this does not automatically delete your VocabFlow account.

6. Free and Premium Plans

VocabFlow operates on a freemium model:

6.1 Premium Subscriptions and In-App Purchases

• Premium access is available via in-app purchase through Apple App Store or Google Play Store. All transactions are processed by Apple or Google under their respective terms; we do not store payment card data.
• Subscription pricing, billing frequency, and any applicable free trial period are displayed at the point of purchase.
• Cancellation: You may cancel your subscription at any time through your Apple ID or Google account settings. Cancellation takes effect at the end of the current billing period; no refunds are issued for the unused portion of a paid period, except as required by applicable law.
• Refunds: All refund requests for Apple App Store purchases must be directed to Apple; for Google Play purchases, to Google. We have no control over and cannot process these refunds.
• Prices may change upon reasonable advance notice.

7. Acceptable Use

You agree not to:

• Use the Service for any unlawful purpose or in violation of applicable regulations.
• Attempt to gain unauthorized access to our systems or other users' accounts.
• Scrape, crawl, or extract data from the Service by automated means without our written permission.
• Reverse-engineer, decompile, or disassemble any part of the Service.
• Upload, transmit, or distribute any content that is harmful, offensive, defamatory, or infringes third-party rights.
• Use the Service to send unsolicited communications (spam).
• Impersonate any person or entity.

We reserve the right to investigate and take appropriate action — including suspension or termination — against any user who violates this section.

8. Intellectual Property

8.1 Our Content

All software, design, text, graphics, logos, and other materials that form part of the Service (excluding User-Generated Content) are owned by or licensed to VocabFlow and protected by applicable intellectual property laws. You receive a limited, non-exclusive, non-transferable, revocable licence to use the Service for your personal, non-commercial purposes only.

8.2 AI-Generated Content

Word definitions, example sentences, and other AI-generated content provided by the Service are generated programmatically and provided for educational use. We make no representations that such content is error-free. You may use it solely within the Service for your personal learning.

8.3 Feedback

If you provide feedback, suggestions, or ideas about the Service, you grant us a perpetual, irrevocable, royalty-free licence to use that feedback for any purpose without obligation to you.

9. User-Generated Content

If you create custom word lists, add personal notes, or otherwise submit content ("User Content"):

• You retain ownership of your User Content.
• You grant us a non-exclusive, worldwide, royalty-free licence to store, process, and display your User Content solely for the purpose of providing the Service to you.
• You confirm that your User Content does not infringe any third-party rights and does not violate applicable law.

10. Privacy and Data Protection

Your use of the Service is subject to our Privacy Policy, which is incorporated into these Terms by reference. We process personal data in accordance with the General Data Protection Regulation (GDPR) and other applicable EU data protection laws.

• You have the right to access, rectify, erase, restrict, and port your personal data.
• You may withdraw consent at any time where processing is based on consent.
• To exercise your rights, contact us at anatolii.krotov@gmail.com.

11. Disclaimer of Warranties

The Service is provided "as is" and "as available" without warranties of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement.

We do not warrant that:

• The Service will be uninterrupted, error-free, or secure.
• AI-generated content will be accurate, complete, or suitable for any specific purpose.
• Any defects will be corrected.

12. Limitation of Liability

To the maximum extent permitted by applicable law, VocabFlow and its operators shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including loss of profits, data, or goodwill, arising from your use of or inability to use the Service.

Where liability cannot be excluded under EU consumer law, our total aggregate liability for any claim shall not exceed the greater of (a) the amount you paid us in the 12 months preceding the claim, or (b) €50.

Nothing in these Terms excludes or limits liability that cannot be excluded under applicable law, including liability for death or personal injury caused by negligence, or for fraud.

13. Account Suspension and Termination

By us: We may suspend or terminate your account at any time if:

• You breach these Terms.
• We are required to do so by law.
• We discontinue the Service (with reasonable notice where possible).

By you: You may stop using the Service at any time.

Upon termination, your right to access the Service ceases. We may delete your data subject to our data retention obligations under applicable law and our Privacy Policy.

14. Account Deletion

You can permanently delete your account directly from within the VocabFlow mobile app (Settings → Account → Delete Account). Deletion is irreversible and will erase your learning progress, word lists, and associated personal data, subject to legally required retention periods.

Alternatively, contact us at anatolii.krotov@gmail.com to request account deletion.

15. Changes to the Service

We may modify, suspend, or discontinue any part of the Service at any time. We will provide reasonable notice of material changes where practicable. Continued use of the Service after such changes constitutes acceptance of the modified Service.

16. Changes to These Terms

We may update these Terms from time to time. When we do, we will:

• Update the "Last updated" date at the top of this page.
• Notify you via in-app notification or email for material changes.
• Require re-acceptance where required by law.

If you do not agree to the updated Terms, you must stop using the Service and delete your account.

17. Governing Law and Dispute Resolution

These Terms are governed by and construed in accordance with the laws of the European Union and the jurisdiction in which VocabFlow is registered, without regard to conflict-of-law principles.

EU consumer rights: If you are a consumer resident in the European Union, you benefit from mandatory provisions of the consumer protection law of your country of residence, which these Terms do not override.

Online Dispute Resolution: The European Commission provides an Online Dispute Resolution (ODR) platform at ec.europa.eu/consumers/odr. We are not obliged to participate in an ADR procedure but are open to resolving disputes amicably.

For all disputes, please first contact us at anatolii.krotov@gmail.com to seek an amicable resolution.

18. Contact Us

For questions, complaints, or requests related to these Terms:

Email: anatolii.krotov@gmail.com

We aim to respond to all inquiries within 10 business days.