Another free app to share. It is not super easy so my students who like a challenge enjoy it.
Kakoom was created by Greg Tang, who has lots of resources on his website.
The app has changed since I first downloaded it. I like the look of it now, but students do have to create an account before using it. All my ipads in my classroom have the old app so I do not have to worry about that. But if I did, I would just create one account and sign into each ipad app with that account. It is not easy to get signed out, so you wouldn't have to continue to do it.
This is the description of the game. Students can practice multiplication, addition, and addition of negative numbers. The negative integers is my favorite part of the game because there are few integer operations practice games out there.
The accounts are to keep track of points. Students can play practice rounds or play live with other students from around the world.