Sudoku - Classic Number Game

Sudoku is the classic number puzzle game, made simple and beautiful.

Fill the 9x9 grid so every row, column and 3x3 box contains the numbers 1 to 9. Easy to learn, endlessly challenging.

FOUR DIFFICULTY LEVELS
Easy, Medium, Hard and Expert sudoku puzzles. Every puzzle is generated fresh and has exactly one solution, so you never get stuck on an unfair board.

PLAY OFFLINE, ANYTIME
No internet needed. Play sudoku on the train, on a flight, or anywhere with no signal.

SMART FEATURES
- Pencil notes for marking possible numbers
- Notes clear themselves automatically when you place a number
- Unlimited undo
- Hints when you are stuck
- Row, column and box highlighting
- Mistake counter so you always know where you stand

NEVER LOSE YOUR PROGRESS
Your puzzle saves automatically. Close the app mid game and pick up exactly where you left off.

LIGHT AND DARK THEMES
A clean light theme for daytime, and a comfortable dark mode for playing at night.

TRACK YOUR BEST TIMES
Beat your personal record on every difficulty level.

Free sudoku, no registration, no account needed. Just open and play.