Sudoku is a free sudoku solving app. It offers 4 Sudoku variations and 5 difficulty levels in one place with virtually limitless number of puzzles.
Improve your solving skills and learn new solving techniques with an advanced hint system.

Variations offered:
- Classic Sudoku
- X-Sudoku (Diagonal Sudoku)
- Hyper Sudoku (Windoku)
- Jigsaw Sudoku (Nonomino)



Additional features:
- Input modes: cell first and digit first
- Pencil marks (with automatic removal)
- 5 difficulty levels
- Digit highlighting
- Count of remaining digits
- Undo
- Validation


Please contact me at [email protected] if you have any questions, comments, suggestions or feature requests.