Last updated: April 20, 2026
This Privacy Policy describes how Sudoku Friend ("we", "our", or "the app") handles your information. We are committed to protecting your privacy and being transparent about our practices.
2.1 Advertising Data
We use Google AdMob to display advertisements, including banner ads and interstitial ads. AdMob may collect device identifiers, usage data, and other information as described in Google's Privacy Policy (https://policies.google.com/privacy).
2.2 Analytics Data
We use Firebase Analytics and Firebase Crashlytics to collect anonymous usage data and crash reports. This helps us improve app stability and user experience. No personally identifiable information is collected through these services.
2.3 Backend Service Data
The app connects to PlayFab on startup using an anonymous device-generated identifier. This connection is a legacy feature and the data retrieved is not actively used within the app. No personal information is collected or linked to this identifier.
2.4 Local Game Data
Your puzzle progress, saved files, and app settings (such as sound preferences) are stored locally on your device. We do not access, collect, or transmit this data to any server.
The app requests the following permission:
- Internet (INTERNET): Required for displaying advertisements (AdMob), sending anonymous analytics and crash reports (Firebase), and connecting to backend services (PlayFab).
- All game data, including puzzle progress and settings, is stored locally on your device.
- We do not maintain any external database of your personal data.
The app integrates with the following third-party services:
- Google AdMob: For displaying advertisements.
- Firebase Analytics: For anonymous usage analytics.
- Firebase Crashlytics: For crash reporting and app stability monitoring.
- PlayFab: Legacy backend service connection.
These services have their own privacy policies, and we encourage you to review them:
- Google Privacy Policy: https://policies.google.com/privacy
- Google AdMob: https://support.google.com/admob/answer/6128543
- Firebase: https://firebase.google.com/support/privacy
- PlayFab: https://privacy.microsoft.com/privacystatement
This app is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, please contact us so we can take appropriate action.
We implement appropriate measures to protect your data:
- All game data is stored locally on your device, protected by your device's security.
- We do not transmit personal data to any third-party servers.
- Communication with third-party services uses secure connections.
We may update this Privacy Policy from time to time. We will notify you of any changes by updating the "Last updated" date at the top of this policy. Continued use of the app after changes constitutes acceptance of the updated policy.
If you have any questions or concerns about this Privacy Policy, please contact us at:
Email: kazumasa678@gmail.com