Classic Abacus

abacus is a great tool to learn mental math but first you have to practice on a traditional abacus.
this app is a digital simulation for the classic abacus that can help you accomplish this task so you can practice anywhere and anytime, the mechanics of its use is simple, and its accuracy is assured by repetition and practice alone
you can use it on your own or you can encourage your kids to use it .
it not only for mathematical use but it can expand their intelligence


FEATURES:
- physics simulation for the gravity using accelerometer sensor
- digital screens
- sounds
- customizable columns number
- customizable beads number
- light tests for practice
- easy to use layout
- multi-touch