Sudoku Duel

Privacy Policy & Support

Privacy Policy

Last updated: 23 June 2026

Sudoku Duel is built to respect your privacy completely. The app does not collect, store, transmit, or share any personal data.

• There are no user accounts and no sign-up.
• There is no analytics, tracking, or advertising of any kind.
• The app makes no network requests and has no backend server.
• Your game progress, statistics, achievements, and settings are stored only on your device.
• When you challenge a friend, the puzzle and your time are encoded into a link that you choose to share through your own apps (Messages, WhatsApp, etc.). We never see, receive, or store that information.

Because Sudoku Duel collects no data, there is nothing for us to sell, share, or disclose, and no data for you to request or delete from us.

If this policy changes, the updated version will be posted on this page.

Support

Need help, found a bug, or have a feature idea? We'd love to hear from you.

📧 mailliamapp@gmail.com

Please include your device model and iOS version if you're reporting a problem — it helps us fix things faster.

Frequently asked

How do I challenge a friend?
Finish any puzzle, tap “Challenge a Friend” on the win screen, and share the link. Your friend taps it to play the exact same board and race your time.

Do my friend and I need accounts?
No. Everything works through a shared link — no accounts, no sign-up.

Is the Daily Puzzle the same for everyone?
Yes — everyone gets the same puzzle each day.