Privacy policy

Last updated: 9 November 2026

My Sudoku, the Android app and the web version on this site alike, does not collect, store on any server, or share any personal data.

• There are no user accounts, no advertising and no analytics. The app does not connect to the internet itself.
• Your games and your settings are stored only on your device: in the Android app, or in your browser's storage for the web version. They may be part of your own device backup if you use one. Uninstalling the app, or clearing this site's data in your browser, deletes them.
• If you import a puzzle “From a picture”, the picture you choose or take is analysed on your device to read the puzzle. It is kept on your device with the puzzle, so that you can check the clues against it, until you delete the puzzle or uninstall the app. It is not sent anywhere, and the Android app leaves it out of device backups uploaded to the cloud. The camera is used only when you choose to take a photo.
• The optional daily reminder, on Android, is a notification your phone shows at the time you choose. Nothing is sent anywhere.
• Sharing a result or the app hands a short text to your device's share sheet, or copies it. It goes only where you send it.
• Optional contributions (“Support the project”, on Android) are paid through Google Play, under Google's terms and privacy policy. The app receives only a confirmation of the payment, on your device; it does not see your payment details, does not keep a record of contributions and sends nothing anywhere.
• “Send feedback” opens your own e-mail app with a message to the developer, followed by details that help to understand a problem: the app's version, your device and screen, your settings, the puzzle in progress and the last error the app met. You can read, change or remove them; nothing is sent unless you send the e-mail. Messages received are used only to answer you and to improve the app.
• This website is hosted by Cloudflare. Like any web host, Cloudflare receives your IP address and the pages your browser asks for, to deliver them and to protect the site from abuse, under Cloudflare's own privacy policy. The site itself sets no cookies and runs no analytics.

Contact: maxou.houllier@gmail.com