A Sudoku that feels like a sanctuary, not a waiting room. No registration. No pressure. Just open and play.
Real difficulty across 6 levels
Difficulty comes from the logic required by the board, not how many numbers are missing. From starter levels to advanced techniques like X-Wing. Extreme level goes beyond our hint engine: strictly for experts.
Game modes
* Classic: tracks your time, accuracy, and stats.
* Zen: no timer, no mistakes, no way to lose.
Daily challenge
A new puzzle every day. See how many people around the world solved it with you, free from leaderboards or pressure.
Hints that teach
They don't just give you the answer: they explain the technique, the rule, and the logic behind it.
Features
* 100% offline: play on a plane, subway, or with zero service.
* Your data stays yours: no accounts; progress stays on your device.
* Thoughtful design: 3 color themes (including warm night mode), pencil notes, and custom highlights.
* Respectful ads: no ads interrupting your game, near the keypad, or on the victory screen.