Todo K-2 Math Practice

Todo K-2 Math Practice

https://itunes.apple.com/us/app/todo-k-2-math-practice/id666465255?mt=8

Cost: FREE
Pros: Lets students work independently to learn math facts in a new and fun way.  The games are created to give students encouragement and feel confident with math.  This app also builds fluency through repetition of math facts.  This app also has different types of games that deal with counting, tracing, tallies, dragging numerals around to create frames, and looking at addition and subtraction facts.
Cons: This is only intended for grades K-2.  I would like to see an app like this for math facts through 5th grade that has games for all types of math problems for all types of students.
How it can be used in education: This app is a great center for students to work on independently while a teacher is focusing on teaching addition and subtraction in another center, using a different technique.
Have I tried similar apps/features?  I have not tried any apps that are similar to this one.