From Mindless Dribble:
GroupMe - the free, simple way to stay connected with those who matter most. Family. Roommates. Friends. Coworkers. Teams. Greek Life. Bands. Faith Groups. Events. Vacations. Add anyone to a group via their phone number or email address. If they are new to GroupMe, they can start chatting over SMS immediately.
What's new in this version:
Dark Mode! It covers the main screens (stay tuned for more), and can be enabled from the app Settings. Great for using GroupMe in the middle of the night!
It is now possible to change the phone number associated with your GroupMe account from within the app.
Fixed a bug that would cause duplicates to appear in the gallery.
It is now possible to save a received video message.