Support

You start as a guest, and a guest’s progress stays on that phone. In Me → Save your progress, add your email and type in the 6-digit code we send you. On a new phone or in a browser, sign in with the same email from Me → Save your progress → Sign in: your friends, stats and streaks come along.

Look in your spam or junk folder, and check the address is spelled right. A code works for an hour, and you can ask for a new one on the same screen. Still nothing after a few minutes? Write to us.

In Me → Friends, share your friend code or type in a friend’s. Someone you’ve been in an online room with can be added from the ⋯ beside their name.

Tap a friend in your friends list, or the ⋯ beside a player’s name in a room’s lobby, a game’s results or your notifications, then choose Report or Block. We read every report. A player you block can’t join your rooms or send you friend requests or challenges; you can unblock them in Me → Friends → Blocked players.

Yes. Solo puzzles, the daily challenge and your statistics work offline, and so do rooms with bots in the iPhone and Android apps. Your results are sent once you’re back online. Playing with people, friends and challenges need a connection.

Check that Sudoku Knockout may send notifications in your phone’s settings. While the game is open, new requests and invites show at the top of the screen and on the bell instead.

In Me → Your account (Save your progress for a guest), choose Delete all data or Delete account. What each one deletes is on the delete your account page.

Yes, completely: there are no ads and nothing to buy.