Chess64 Privacy Policy

Effective date: March 2026

Chess64 ("the app") is a chess tactics training app developed by Daniel Parks. This policy explains what data we collect, how we use it, and your rights.

Data We Collect

When you use Chess64, we may collect the following:

• Apple Sign-In data: Your Apple-provided user identifier, name (if shared), and email (if shared). We use this solely for account authentication.
• Puzzle progress: Which puzzles you've solved, solve times, accuracy, streaks, and training session data. This is stored on our servers to sync across your devices.
• Game data: Bot game records, moves, and post-game analysis results.
• ELO rating: Your calculated skill rating based on puzzle and game performance.
• Subscription status: Whether you have an active premium subscription (managed entirely by Apple).

Data We Do Not Collect

• We do not collect your real name, phone number, or physical address.
• We do not use third-party analytics or advertising SDKs.
• We do not sell, share, or rent your personal data to third parties.
• We do not track your location.

How We Use Your Data

Your data is used exclusively to provide the Chess64 service: authenticating your account, syncing puzzle progress, calculating statistics, and personalizing your training experience.

Data Storage and Security

Your data is stored on secured servers hosted on Amazon Web Services (AWS). Personal identifiers are encrypted at rest. All data transmission between the app and our servers uses TLS encryption (HTTPS).

Data Retention

We retain your data for as long as your account is active. You can delete your account at any time from the Settings screen in the app, which permanently removes all your data from our servers.

Your Rights

You can:

• Access your data: View your stats and progress in the app.
• Export your data: Use the CSV export feature in the Stats tab.
• Delete your data: Delete your account from Settings, which removes all server-side data.

Children's Privacy

Chess64 does not knowingly collect data from children under 13. The app is suitable for all ages but account creation requires Apple Sign-In, which is governed by Apple's age restrictions.

Changes to This Policy

We may update this policy from time to time. Changes will be posted on this page with an updated effective date.

Contact

For privacy questions or data requests, contact us at: privacy@chess64.app