As good as an abacus app gets – FingerMath ABACUS - addition,subtraction Review

Liked the app, but 3.99 is bit high, especially if have to restore your iOS device since you ll have to fork out another 3.99 to unlock the full version. If u want to learn how to use an abacus this app will do it.
Review by mole058 on FingerMath ABACUS - addition,subtraction.