The World GO 2.0 description

This app only uses Google login and does not require any permissions.

This game is a Go game that can be played by online.

This app has been in service since January 2015.
More than 10,000 players use this app every day.

1. Play online with players around the world
2. Watching Go Masters' Play
3. Play directly with your friends as a friend add function
4. Watch the your record and send to friends it.
5. Free artificial intelligence to play
6. A set of unique board themes provided in addition to the default board.
7. Title and title match system for high level users
8. Automated House counting System
9. Ban on bad users with manner index system

Just enter your old nickname and password at welcome popup.
It supports the practice with a low level GO AI for beginners.
If you want to learn Go, here you can play with a lot of different levels of strong players.