Last updated: 30 May 2026
CrispSudoku does not collect, transmit, or share any personal data. The app runs entirely on your device and works fully offline.
None. CrispSudoku has no user accounts, no advertising, no analytics, and no third-party tracking SDKs. Nothing you do in the app is sent to us or to any server.
To make the game work, CrispSudoku saves the following locally on your device only (via the operating system's standard app storage): your game progress, statistics (puzzles solved, streaks, best times), unlocked themes and achievements, daily-puzzle completion, and your settings. This data never leaves your device, is not linked to your identity, and is removed when you uninstall the app.
CrispSudoku does not request access to your contacts, photos, location, camera, or microphone. The app makes no network requests on its own. If you tap the contact email or a license link on the About screen, your device's mail app or browser opens — an action you initiate.
CrispSudoku is suitable for all ages and collects no data from anyone, including children.
If in-app purchases are offered in a future version, they are processed by Apple (App Store) or Google (Google Play) under their own terms; CrispSudoku does not receive or store your payment information.
If this policy changes, the updated version will be posted at this URL with a new date above.
Christian Ströbele — postmaster@crispstro.be
CrispSudoku is free software, licensed under the GNU AGPL-3.0.