You can now play Sudoku, Killer Sudoku, Jigsaw Sudoku, Kakuro,Mini Sudoku and Sudoku X from the one application.

Our puzzles are published worldwide including the Daily Telegraph, Chicago Tribune and LA Times. All our puzzles are expertly graded and we guarantee that there is only one solution. Our puzzles can be solved using logical methods with no guesswork required.

We run a daily competition for each puzzle type and you can submit your completed entry and view your position on our daily leader board.

You can practice Sudoku puzzles by choosing from our graded puzzles – Gentle, Moderate, Tough, Diabolical and Extreme.

With both the Daily puzzles and the Practice Puzzles, we save your progress as you go, stopping the clock as you exit. All pencil marks are saved when you exit.

The display is clear and easy to read and you can also display possibles for any cell. You can enter pencil marks for all puzzle types. Pencil marks are saved when you exit the application or receive a phone call.

Future releases will include Hitori, Nurikabe and Mini Killer (6×6).

Cool Sudoku will keep you entertained for many hours, ideal for use when commuting and so much more sociable than playing the Ocarina or iFart !