Stuck on something that isn't a puzzle? Write to us and a person will answer.
Email sudoku@bonendo.com. Include your iPhone or iPad model and iOS version if you are reporting a problem; a screenshot helps.
No. Hints are unlimited and free. The review card after a solve notes which techniques you read a hint about, but that describes the puzzle, not you, and nothing is deducted.
Not necessarily. The streak forgives one late solve a week. Open the Daily tab, pick the day you missed, and solve it; if you have a catch-up available, the calendar says so on that day.
Every puzzle you finish while a tournament is running adds its score to your total, whether you started it from the tournament's Play button or from Home. Some tournaments count only one difficulty band; the tournament's page says which. Medals are earned by reaching point thresholds and need no sign-in.
Rankings against other players use Game Center. Sign in from the tournament page or in iOS Settings under Game Center. Medals and everything else work without it.
The list refreshes each time you open the Events tab while online. Offline, the app shows the last list it downloaded.
The app follows your device's language, and you can set a per-app language in iOS Settings under Sudoku › Language. Twelve languages are included.
It is a one-time purchase that unlocks three alternate app icons and puts a small heart on your profile. Nothing else changes: every puzzle, hint and technique is free without it. Find it under Profile › Support the app, where Restore purchase also lives if you reinstall or change devices.
Your games and statistics are kept on your device and, if iCloud is on, in your private iCloud storage. Reset Statistics is in the Stats tab and saved games can be deleted from Profile › Saved Games; either removes them from every device on the same iCloud account. Deleting the app removes only that device's copy. Game Center scores are managed by Apple in your Apple Account settings.
Not if iCloud is on for the app. Games and statistics sync through your private iCloud, so they come back on a reinstall and appear on your other devices signed in to the same Apple Account. Preferences stay on each device.
Yes, with the screen off if you like. Every cell announces its position and contents, hints are spoken as sentences that stand on their own, and a rotor jumps between empty cells, conflicts and the cells a hint is pointing at. The accessibility page has the detail, including the two things that are not there yet.