Go is also known as igo (囲碁), wéiqí (围棋), or baduk (바둑).
This Go game carries thousands of Go problems and professional Go games in your pocket with a very strong graphic interface. 

Go game features:


1 7000 go problems(a very huge database and will be expanded to 40,000 in future)

2 Each problem has a text explanation in detail to help you understand why.

3 There are two modes for solving problems.

One mode is auto-run mode which enable you to solve each step by yourself or obtain a help from the software.
And in this mode, 19x19 layout is used and detailed text explanation for each step is attached.

Another mode is problem solving mode, in this mode you will solve the problems by your self. And this mode uses a small layout ( some problem may not work in this mode because of the small layout)

Both modes can record your play process and four options (forward, backward, go to the begin, and go to the end) are supplied.

4 A tutorial which includes many games with detailed explanation are supplied

5 sgf graphic interface just like any popular Go software

Source: http://itunes.apple.com/us/app/go-game/id363874000?mt=8