There are two versions of Igowin that may confuse the user in Apple Store. One is Igowin; the other is Igowin Pro. If you want to buy one of them, I think Igowin Pro is better because it allows the user to save games, and to make comments on the games. You can set the strenght of Igowin Pro to be 3 kyu (its maximum level). If you can beat it, the AI will record your rank as 1 dan.