A free app for Android, by Shoko Sakurai.

BearTsumego – Play Go Exercises focuses on “Little and often fills the purse”.

Are you tired of spending money for books, or are you someone who solves tsumego a lot? If you want to get back to the game little by little, BearTsumego – Play Go Exercises will be your new best friend. You can easily play with many different exercises to learn more and more by solving.

You can play tsumego in different moves and can choose the game mode you prefer. Moreover, you can purchase many additional exercises at a great price.