Sudoku Classic
The clean 9x9 number puzzle. Four levels, notes and hints — plays offline.
What it is
Fill the grid so every row, every column and every 3x3 box holds the digits 1 to 9 exactly once. Every puzzle is generated on your phone and has exactly one solution, so it can always be solved by logic.
- Easy, Medium, Hard and Expert
- Pencil notes with automatic cleanup, unlimited undo
- 3 free hints per puzzle — watch a short video for more
- Mistake counter, timer and best times (hint-free solves)
- Auto-save: close the app and continue later
- Plays offline — no account, no purchases; free with ads
Privacy
Your progress stays on your device. The game shows ads (Google AdMob) and uses Google Analytics for Firebase; in the EEA, UK and Switzerland it asks for your consent first. Read the privacy policy or learn how to delete your data.