Privacy Policy

Knight Mate · Last updated: July 2026

Knight Mate (“the app”) explains here what information the app handles and how. If you have any questions, contact us at rvmobileappdev@gmail.com.

In short: You can play against the computer and solve puzzles with no account and no sign-in. Your games, puzzle progress, and settings stay on your device. The app uses Google Firebase to collect anonymous usage and crash data to improve the app, and does not show ads. The optional Play Online feature signs you in to your own Lichess account.

1. Information stored only on your device

The following are saved locally on your device and are not transmitted to us:

2. Analytics and crash reporting

Knight Mate uses Google Firebase Analytics and Firebase Crashlytics to understand how the app is used and to diagnose crashes. This may include anonymous usage events (for example, which features are opened), crash and diagnostic logs, and device identifiers such as a Firebase installation ID. This data is not linked to your identity and is not used to personally identify you. It is processed by Google on our behalf; see Google’s Firebase privacy documentation. Knight Mate does not display advertising.

3. Play Online (Lichess)

The optional Play Online feature lets you play live games through Lichess (lichess.org), a third-party chess service. When you choose to sign in, Knight Mate opens a Lichess login page in your browser and uses OAuth to obtain an access token. Knight Mate never receives or stores your Lichess password; only the access token is stored, encrypted, on your device. Your online games and profile are handled by Lichess under Lichess’s own privacy policy. You do not need to sign in to use any other part of Knight Mate.

4. Deleting your data

You can delete the app’s locally stored data by signing out or uninstalling the app. To revoke Knight Mate’s access to your Lichess account or close that account, and for full instructions, see our Delete Account & Data page.

5. Children’s privacy

Knight Mate is intended for a general audience aged 13 and over. We do not knowingly collect personal information from children.

6. Changes to this policy

If this policy changes, the updated version will be published here and the date above will be revised.

7. Contact

Questions about this policy? Email rvmobileappdev@gmail.com.