I use Sudoku Challenge V 1.2.0 on my iTouch 2G and really enjoy the program. It has provided me with hours of entertainment. The program works very well and the ability to put small "reminder" numbers in the squares is a great feature.
My only real complaint is the program over-rides (by pausing) the music I am listening to. I would like to have the ability to (1) listen to the music I am playing from my playlists, and not have any sounds from the game; or (2) go with the sounds from the game, including the game music. Fix this and I will give the program 5 stars.
Deep.Cove about Sudoku Challenge!