Sudoku Cheat is a Sudoku solver for iPhone and iPod Touch. It's an excellent tool for checking your answers once you've solved a Sudoku yourself. Or, if you're stuck on a particularly tricky puzzle, you can use Sudoku Cheat to fill in the blanks without taxing your brain.
Sudoku Cheat was designed to be simple and usable. It focuses on performing only one task—solving 9×9 Sudoku puzzles—and the whole app fits on one uncluttered screen.