I have been using the Astraware sudoku app, and I will probably not delete that one because I have this one. I probably dont actually save any time using the OCR on this game to import a puzzle, but this app scores in coolness factor. Also, I like the fact that you can import a puzzle and save it for later. With the Astraware app, once you import a puzzle, thats the only one you can play, until you solve it and enter another one. Astraware scores over this one in playability, by a slight margin, however. My biggest issue with this app is my inability to read the teeny-tiny red and green numbers that are displayed when a puzzle is imported. It would be nice if the numbers were larger. Since you can read the picture through the overlay numbers, there is no reason why they cant be bigger. This app is well worth the price, in my estimation. Thanks!