5 stars: Excellent app. Great customization, easy to use and commucate. I have one issue; if playing with a friend mobile device to mobile device and I send an invite, they don't receive it since they are signed in on another device. I doesn't affect the game once we get connected but a little annoying. Not going to knock off a star since it's still great.
5 stars: I used to play chess in college, but after starting working in corporate it got lost in time. I recently found out about this app and it's been amazing, you get to play with players all over the world across formats. You also get assigned ratings, can learn moves, practice and keep improving yourself while having fun. A hundred percent recommended for chess lovers.
4 stars: It helps me work on my chess skills and is very helpful but I don't like how if you want to check you mistakes and how well you did you have to pay for it. It's flat out annoying. There is also this feature that has caused me to lose quite a few matchs where you drag the pieces and tap where they go and it has cost me to lose quite a few matchs.
3 stars: About a year ago, the app had a number of issues (e.g. re. timer), which were later fixed. The newest bug is that some moves I make are not properly executed, as the piece I choose to move ends up on the wrong square. This does not happen often, but usually prompts me to resign the game. - I have no comparable problems when I use other apps, so I don't believe that my phone is defect...