Frequently asked questions
Does Sudoku+ cost anything?
No. Sudoku+ is completely free – all puzzles and all duels, with no purchase and no daily limit.
Do I need an account?
Not for free play. For daily puzzles, duels, leaderboards and continuing on several devices you sign in with an email code – no password.
Does the app work without internet?
Free play works in the apps without a connection. Duels, leaderboards, special puzzles and syncing between devices need internet – without it the app shows “Offline – online features paused”.
How do I switch devices?
Sign in on the new device with the same email address. Progress, profiles, level and trophies sync automatically.
Where can I play?
Right in the browser at sudokuplus.app, as an app for Android and iOS, and for Windows.
The sign-in code doesn't arrive.
Check your spam folder, check the spelling of the address and tap “Resend code”. With “Other email” you can try a different address.
Why does my number shake?
In Action mode every entry is checked immediately. If it shakes it isn't right – in duels and daily puzzles that costs penalty time. In free play it doesn't.
My puzzle is gone – where do I find it?
Unfinished puzzles are on the start screen under “Continue”. A free-play puzzle disappears if you cleared it with the ✕.
Kids are playing – what should I know?
Create a kids profile: it opens straight on the colourful 4×4 board, with no daily puzzles, duels or feedback prompts.
How do I delete my account and data?
In the app under “Delete account” or via the page Delete account & data. Privacy details are in the privacy policy.
I found a bug or have an idea.
Tap the speech bubble 💬 in the game and write to us. Please report security vulnerabilities via the security page.