LibreSudoku

Libre-Sudoku is a full-featured Sudoku app with puzzles in 9x9, 6x6, and 12x12 sizes. Choose from four difficulty levels and enjoy tools like pencil marks, undo, and game stats tracking. Customize your experience with themes, input methods, and even create your own puzzles. It's everything you need for the perfect Sudoku challenge on your Android device!