The classic Japanese logic game free on your iPad. What makes this version super? Firstly, a top notch graphical interface and exceptionally smooth interaction, four levels of difficulty, options to show hints, uncover a certain square, the whole board, show you errors and more. A must for every iPad, and it's free!
Note: When selecting options such as "Show Hints" or "Solve Whole Board" please allow a few seconds for the operation to process.