AbacusPro is the ultimate retro calculator for the iPad! ? This is the best selection of abacuses available in one iPad app. AbacusPro is a great addition to your collection of educational, utility or novelty apps. Visit my website to see a video presentation.
Four different abacuses are included-
* the modern Japanese soroban
* the traditional Chinese suanpan
* the next generation Chinese suanpan
* the rare and distinctive...