Privacy Policy

Overview

Chess Clock (“we”, “our”, “the app”) is a chess timer application available on iOS and the web at chess-clock.app. We are committed to protecting your privacy.

Data We Collect

Clock Data: Match names, time controls, and clock state you create within the app. This data is stored locally on your device and optionally synced via Firebase when you use the Live Sharing feature.

Anonymous Authentication: When you use Live Sharing, we create an anonymous session using Firebase Authentication. No personal information (email, name, phone number) is collected. The anonymous identifier is used solely to authorize read/write access to shared clock data.

Analytics: The iOS app uses privacy-friendly analytics. We collect anonymous usage events to improve the app. No personal data is included.

Live Sharing

When you share a clock live, the clock state (player names, time remaining, time control) is stored temporarily in Google Firebase Firestore. This data is accessible to anyone who has the 6-character share code. Shared data can be deleted by the game owner at any time by stopping the share.

Data We Do Not Collect

• We do not collect your name, email address, or phone number
• We do not track your location
• We do not sell or share your data with third parties
• We do not display advertisements
• We do not use cookies for tracking

Data Storage

iOS app: Clock data is stored on your device.

Shared clocks: Stored in Google Firebase Firestore (US servers) for the duration of the sharing session.

Children’s Privacy

Chess Clock does not knowingly collect personal information from children under 13. The app does not require any personal information to use.

Contact

If you have questions about this privacy policy, please contact us at tihomirvidenov@gmail.com.