Being a fan of Go, and seeing that iGo ($3.99) was just released, I wanted to know if there are any Go apps that are really necessary to have. None of the ones I've found are "complete," but I don't really know if I've found all of the ones available and was wondering if there were other Go fans in the English-speaking app realm. SmartGo Touch ($9.99) looks like the most complete, with over 6000 (!!) games to study, a few thousand problems, and the ability to make/play/record your own games. There are two issues, though: the price, which is really steep, and no AI to play an on-the-go game versus the CPU. I understand AI is tough to program, but even a minimally competent AI would be nice. Tetsuki (Free) is worthless to me, because I don't have constant access to WiFi and don't really care about playing online. Go Player ($3.99) looks minimally interesting, with a bunch of games to study. But for the price, I would frankly rather get a piece of cheesecake. I have Stones (Free), which is just a simple interface to plunk down the stones. iGo looks alright, but are any of these others worthwhile or are there any other Go apps?