iPhone Giveaway of the Day - Cool Sudoku, Jigsaw, Killer, Kakuro, Sudoku X

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

These 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 and Diabolical. 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.