Sudoku Free - puzzle games. A free and offline Sudoku app.

The aim of the game is to place 1 to 9 into each grid cell so that each number can only appear once in each row, each column, and each mini-grid.

More features:
- 4 levels: easy, medium, difficult, and expert，ranging from “Easy” to “Master”.
- Input modes: cell first and digit first - without toggling
- Pencil marks (with automatic removal)
- Works offline
- Digit highlighting
- Count of remaining digits
- Automatic saving
- Undo
- Board validation
- Optional aids
- Edge to edge board
- Satisfying animations