Support

What's free, and what does the unlock add?

A fresh daily puzzle is free every day, forever, along with a starter library of 30 puzzles (the first ten of each difficulty). The one-time lifetime unlock opens the rest of the catalog, the 90-day daily archive, and every puzzle added in future updates. It's a single purchase — no subscription.

I bought the unlock on another device. How do I restore it?

Open Settings inside the app and tap Restore Purchases. Your unlock is tied to your Apple ID, so it restores on any device signed into the same account. If Family Sharing is set up for your household, the one purchase can be shared by your family group.

Are my games synced between my iPhone and iPad?

Not in this version. Games, history, and best times are stored locally on each device. Your purchase restores across devices through your Apple ID, but in-progress games do not transfer. Cross-device game sync is something we may add later.

How do notes, check, and reveal work?

Tap the pencil to enter notes mode and pencil in candidates; automatic cleanup removes notes that a placed number rules out. Check flags mistakes, Reveal fills a cell you're stuck on, and Fill in all notes pencils every valid candidate so you can skip the bookkeeping. Every gameplay feature is free.

Is Calm Sudoku accessible?

Yes. It supports VoiceOver, Dynamic Type, Reduce Motion, hardware keyboard input, and adaptive iPhone and iPad layouts in both light and dark appearance. If something isn't working for you, please tell us.

What data do you collect?

None. Calm Sudoku collects no data — see our Privacy Policy. Everything stays on your device.

I found a bug or have a suggestion.

We'd genuinely like to hear it. Email [email protected] with your device model and iOS version and we'll take a look.