9x9 grid Sudoku puzzles in 4 different skill levels (easy, medium, hard, evil) with timer support and best-times. Features: • unlimited undo & redo • pencil notes and 'clear all notes' menu • validate, hints, solve • random puzzle generator so you will always get a new one. • create blank puzzles to solve your newspaper Sudoku. • open and save your puzzles, auto save previous puzzle • use 'tap and hold' on the digits to reverse the input • settings (colors, candidates, smart digits, clock, best times, correct, errors, mark active numbers, highlights, sound, vibrate, screen time-out). • portrait and landscape modus • share puzzle • 10 free trial puzzles.