4 stars: It's a great app for practicing go problems, new problems are given daily. Nice clean interface. It would be 5 stars if there was more explanation to the solutions, especially the harder ones as it's often not clear why a move is correct or considered wrong. You have to play out all the variations yourself, which is a good skill to learn but a little help would be nice for a beginner like me :)
4 stars: Some problems do not show all paths to a win. On some, white can force a win even after black has \
5 stars: Phenomenal app, best for doing Tsumego. Don't fall into the trap of doing those puzzles mindlessly. Read/find the correct sequence first till the end and only then play. Otherwise you will acquire bad habit. I also liked the interface and the \
5 stars: Very good! This app is helping me resurect my old and rusty Go skills. Ha! So far, *every time* I think there might be another way to solve the problem, I play it out and find I am wrong! :-o
5 stars: You can learn the game intensively by solving the problems. It is the most useful app to improve your level in a short time.
4 stars: As a new player I'd like annotations on the solutions rather than \
3 stars: It could use explanations of the intended goal in each problem. I'm also not a fan of how they dripfeed you with new problems each day instead of just giving you access to their whole library, and admitting that they don't have (many?) more. People aren't coming up with new go problem...