SudoQ is the ultimate sudoku app. Intuitive, unlimited supply, many difficulties and shapes, zero ads, open source, no permissions. For a complete list of features, see below: Not just 9x9. Bored by 9x9 sudokus? Try 16x16, 6x6, samurai sudokus or many more! Too easy? Can't be! We offer 4 difficulty levels. If you still get bored, please send us an email!