Abacus The Calculator

Abacus Calculator is a simple to use calculator app for both iPhone and iPad. Following the rules known in the UK as BODMAS but used all around the world for calculation ordering to produce a universally accurate result and providing you the tools to use it. Basic functions include brackets, square and square roots and constants for Pi and Euler's number (e) and a backspace key so you don't have to remove the whole of a wrongly entered number or calculation.