Great – Arithmetic Genius: Addition and Subtraction - adding and taking away practice for all ages Review

This app is basically all the addition and subtraction practice someone could ever need, presented in simple, bite-sized pieces, with a well-thought-out interface and good execution. And the developer seems to be responsive as well.
Review by Limbo74 on Arithmetic Genius: Addition and Subtraction - adding and taking away practice for all ages.