Sudoku by ChalkBee

Sudoku by Chalkbee.com is a calm, focused Sudoku app built for everyday play. Every puzzle is generated on your device and checked to have exactly one solution. Choose from Very Easy through Very Hard, add pencil notes, undo moves, use an occasional hint and pick up where you left off whenever you return. Features: • Five carefully separated difficulty levels • Uniquely solvable puzzles generated offline • Pencil notes with tap or long-press controls • Optional live error checking and cell highlighting • Undo, erase, hints and full-solution reveal • Automatic offline game resume • Local solve history and completion sharing • VoiceOver-friendly controls • No account required Your puzzle progress and solve history stay on your device.