Privacy Policy & Terms of Service
Last Updated: October 31, 2025
1. Introduction
Welcome to Grandmasters.io. We respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, use, and safeguard your information when you use our chess game platform.
2. Information We Collect
2.1 Account Information
- Email address (if you sign up)
- Username and display name
- Profile picture (optional)
- Authentication data (via Firebase Auth)
2.2 Game Data
- Game history and statistics
- Match results and ratings
- Leaderboard rankings
2.3 Analytics & Cookies
- Google Analytics for usage statistics
- Session cookies for authentication
- Performance and error tracking
3. How We Use Your Information
- To provide and improve our chess gaming service
- To enable multiplayer matchmaking
- To display leaderboards and statistics
- To communicate important updates
- To analyze usage patterns and improve user experience
4. Data Storage & Security
Your data is stored securely using Firebase services (Cloud Firestore, Firebase Auth). We implement industry-standard security measures to protect your information. However, no method of transmission over the internet is 100% secure.
5. Third-Party Services
- Firebase (Google) - Backend services and authentication
- Google Analytics - Usage analytics
- Google AdSense - Advertisement services
6. Your Rights (GDPR)
You have the right to:
- Access your personal data
- Request data deletion
- Opt-out of analytics tracking
- Export your game history
7. Children's Privacy
Our service is not directed to children under 13. We do not knowingly collect data from children under 13. If you believe a child has provided us with personal data, please contact us.
8. Cookies
We use essential cookies for authentication and optional cookies for analytics. You can control cookies through your browser settings.
9. Terms of Service
9.1 Acceptable Use
- No cheating or use of external engines during games
- No harassment or abusive behavior
- No sharing of accounts
- Respect other players
9.2 Account Termination
We reserve the right to suspend or terminate accounts that violate these terms.
10. Changes to This Policy
We may update this privacy policy periodically. Changes will be posted on this page with an updated "Last Updated" date.
11. Contact Us
If you have questions about this privacy policy or wish to exercise your rights, contact us at: support@grandmasters.io