GroupMe is an incredibly useful service, but the app was very lacking in my personal opinion. A beta version has been in the wild for a good amount of time, but it had its own minor issues. Fortunately, the app has been deemed finished and has been pushed to the Play Store! The app includes a redesigned user interface, and a nice one too. It incorporates sliding panels on the left and the right, making navigation a lot faster and easier.
It also includes tablet support, something that has been missing for a while. Along with that come performance fixes and general improvements across the board. The app looks really nice now. Hit the source link to grab the update!