Sudoku

Sudoku, done properly: clean, quick and entirely yours. No ads, no accounts, no tracking, and no internet needed.

A NEW PUZZLE EVERY DAY
Open the daily puzzle and play the same grid as everyone else, worked out on your device from the date. It starts gentle on Monday and builds to Expert on Sunday. A calendar shows every day you have solved, you can go back and play any earlier day, and your streak grows with each one you finish.

PLAY YOUR WAY
- Five difficulties, from Very Easy to Expert.
- Every puzzle has exactly one solution, so you never have to guess.
- Pencil marks, plus a Fast pencil switch that fills in every possible candidate and keeps them up to date as you play.
- Notes refuse a digit that already appears in the same row, column or box, so your pencil marks never contradict the board.
- Undo your last three moves, or switch undo off for a pure challenge.
- Three hints per game when you are stuck. Make three mistakes and the puzzle is over.
- Pause hides the board while the timer is stopped.

STATS THAT MEAN SOMETHING
- Accuracy, average time per game, games played versus cleared, and mistakes and hints per game.
- A breakdown for every difficulty.
- Your three fastest wins at each level, with the full details of each game.
- A daily-puzzle history with streaks, a monthly tally and a look at how each weekday has gone.

17 BADGES TO EARN
Animated badges for wins, skill and daily streaks, such as Flawless, Unaided, Lightning Fast, Grandmaster, Week Warrior and Monthly Master. Each one shows how close you are, and they unlock in regular and daily games alike.

MADE TO BE COMFORTABLE
- Light, dark, or match your phone. Optional dynamic colors.
- Soft, classic sound effects and gentle haptics, both easy to switch off.
- Built to work with screen readers and large text.
- Your game saves automatically. Close the app and pick up exactly where you left off.
- A clear layout on phones and tablets.

PRIVATE BY DESIGN
Sudoku collects nothing and has no internet access at all. Your games, stats and badges stay on your phone.