This app was removed from the App Store.
iOS iPad Education
iAbacus is like a real school abacus with 100 colorful beads. They can be moved by touching them or moving the iPad in any direction. If you do not want the beads to change their positions on its own by movement of the iPad you can switch it off and they will only move by touch. The option of saving the last position is available. Great for children and adults alike. An easy and entertaining way to teach arithmetic while traveling or at home.
Only works in horizontal mode now.
Therefore it is much easier to move the beads by moving the iPad.