1 Features
🎲
Four difficulty levels
Easy, Medium, Hard, and Expert — progress at your own pace.
✏️
Pencil notes
Jot candidate numbers in each cell, just like solving on paper.
💡
3 hints per game
Stuck? Reveal a correct number and keep your momentum.
⏱️
Built-in timer
Track your solving time from start to completion.
❌
Mistakes counter
A live counter keeps you honest and helps you learn.
↩️
Erase easily
Remove a misplaced number with one simple tap.
💾
Auto-resume
Your puzzle saves automatically. Pick up right where you left off.
🌗
Light & dark theme
Switch themes in one tap, right on the home screen.
📱 Works on phones and tablets — the board scales to fit your
screen and stays in a comfortable grid.
2 See it in action
A typical puzzle in light theme — notes, timer, and a highlighted selection all at a glance.
3 Play your way
9×9
Classic grid
4
Difficulty levels
3
Hints per game
0
Accounts / registration
4 Why Sudoku?
- A clean interface with no clutter — nothing distracts you from the puzzle.
- Every puzzle has a unique solution, so you can always finish with logic alone — no guessing.
- No account, no sign-up, no profile. Your progress stays on your device.
- Genuine free-to-play — supported by a small banner and a light-touch ad when you finish a game.
Start solving today
Free on Android and iOS. Your in-progress puzzle saves automatically.