Privacy Policy

1. Introduction

ChessMem ("we", "our", "us") respects your privacy. This policy explains how we collect, use, and protect your personal information when you use our chess opening trainer service.

2. Information We Collect

3. How We Use Your Information

We use your information to:

• Provide and maintain the ChessMem service
• Track your learning progress across sessions
• Process payments and manage subscriptions
• Send important account notifications
• Improve our service based on usage patterns

We do not:

• Sell your personal data to third parties
• Send marketing emails without consent
• Share your data with advertisers

4. Data Storage

Your data is stored securely using:

• Supabase: Database hosting (PostgreSQL) with encryption at rest
• Stripe: Payment processing (we never see your full card number)
• Google: Authentication only (we receive your email and name)

All data is transmitted over HTTPS encryption.

5. Third-Party Services

We use the following third-party services:

• Google Sign-In: For authentication (Google Privacy Policy)
• Stripe: For payment processing (Stripe Privacy Policy)
• Supabase: For data storage (Supabase Privacy Policy)
• Netlify: For web hosting (Netlify Privacy Policy)

6. Cookies and Local Storage

We use:

• Authentication tokens: Stored in localStorage to keep you signed in
• Practice data: Cached locally for offline access and performance

We do not use tracking cookies or third-party advertising cookies.

7. Your Rights

You have the right to:

• Access: Request a copy of your personal data
• Correction: Update inaccurate information
• Deletion: Request deletion of your account and data
• Portability: Export your progress data
• Withdraw consent: Opt out of optional data processing

To exercise these rights, contact us at support@chessmem.com

8. Data Retention

• Active accounts: Data retained while account is active
• Deleted accounts: Data deleted within 30 days of request
• Payment records: Retained for 7 years (legal requirement)

9. Children's Privacy

ChessMem is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe we have collected such information, please contact us immediately.

10. International Transfers

Your data may be processed in countries outside your own. We ensure appropriate safeguards are in place for international data transfers in compliance with applicable data protection laws.

11. Security

We implement appropriate technical and organisational measures to protect your data, including:

• Encryption in transit (HTTPS/TLS)
• Encryption at rest (database encryption)
• Access controls and authentication
• Regular security reviews

12. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes via email or in-app notification. Continued use after changes constitutes acceptance.

13. Contact Us

For privacy-related questions or requests:

Email: support@chessmem.com