Does Open Sudoku contain ads or paid features?
No. There are no ads, subscriptions, paid hints, locked puzzles, lives, or gameplay limits. Tips unlock nothing.
Support
Get help or report a problem.
Write to persianov.petr@gmail.com. Include your device, OS version, app version, and what happened.
Common questions
Can I play without internet access?
Yes. Puzzles, gameplay, hints, notes, settings, and local progress work offline. Friends, ranked play, and Apple account backup need a connection.
Do I need an account?
No. Local play needs no account. Friends and ranked play use a private guest profile. Sign in with Apple backs up that profile and your puzzle progress across devices.
How do I start a Live Race?
Open Friends, choose a friend, tap Live Race, then choose a difficulty. You both receive the same grid and the same start time.
What is Beat My Time?
After completing a ranked puzzle, send Beat My Time from the result or history screen. Your friend plays that exact grid against your verified ranked time; you do not replay it.
How do I delete my data?
While signed in, Delete Puzzle History Everywhere removes progress from this device and your account backup. Delete Account also removes the player profile, friends, races, rankings, and backed-up progress.