How we collect, use, and protect your information
Last updated: August 24, 2025
This Privacy Policy explains how SudokuFriends ('we', 'us', or 'our') collects, uses, and protects your information when you use our online Sudoku platform. We use Google Analytics, Vercel Analytics, Microsoft Clarity, Firebase Authentication, Firebase Realtime Database, MongoDB, and Sentry as part of our service.
When you create an account, we collect your name, email address, and profile picture (if you sign in with Google). This information is used to personalize your experience and sync your progress across devices.
We collect information about your puzzle progress, completion times, difficulty preferences, and game statistics. This data is used to enhance your gaming experience and provide personalized recommendations.
We use Google Analytics, Vercel Analytics, Microsoft Clarity, and Sentry to understand how users interact with our platform and monitor app performance. This includes page views, session duration, device information, error tracking, and general usage patterns. This data is anonymized and used to improve our service.
We automatically collect technical information such as your IP address, browser type, device information, and operating system. This helps us ensure our platform works properly across different devices and browsers.
We use the following third-party services to provide and improve our platform: • Analytics Services: Google Analytics, Vercel Analytics, and Microsoft Clarity help us understand user interactions and improve performance • Authentication & Data: Firebase Authentication and Realtime Database manage user accounts and real-time game features • Data Storage: MongoDB for secure data storage • Error Monitoring: Sentry for application stability and error tracking Each service processes data according to their respective privacy policies and our instructions.
We use cookies, localStorage, and IndexedDB to enhance your experience, remember your preferences, and analyze website traffic. You can control cookie settings through our Cookie Preferences.
We use cookies, localStorage, and IndexedDB to store your preferences, progress, and consent choices. You can control your preferences at any time.
• Provide and improve our Sudoku gaming service • Personalize your gaming experience • Sync your progress across devices • Analyze usage patterns to improve our platform • Communicate with you about updates and support • Ensure security and prevent fraud
We do not sell, trade, or rent your personal information to third parties. We may share anonymized, aggregated data for analytics purposes. We use trusted third-party services like Google Analytics, Vercel Analytics, Microsoft Clarity, Firebase, MongoDB, and Sentry, which have their own privacy policies.
We implement appropriate security measures to protect your information. Your data is encrypted in transit and at rest. However, no method of transmission over the internet is 100% secure, and we cannot guarantee absolute security.
• Access your personal information • Update or correct your information • Delete your account and associated data • Export your data • Opt out of analytics tracking • Withdraw consent for data processing
We retain your personal information as long as your account is active or as needed to provide our services. You can request deletion of your account and data at any time.
Your information may be transferred to and processed in countries other than your own. Our service providers (Google, Vercel, Microsoft, Firebase, MongoDB, Sentry) may process your data in the United States or other countries. We ensure appropriate safeguards are in place for such transfers.
Our service is not intended for children under 13. We do not knowingly collect personal information from children under 13. If you become aware that a child has provided us with personal information, please contact us.
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the 'Last updated' date.
If you have any questions about this Privacy Policy, please contact us through our contact form or email us directly.