Easy-to-use math calculator that immediately computes the result as you type a math expression. It allows to calculate multiple math expressions at the same time. It also allows defining your own variables and functions that can be set to a value or other math expressions. It has a beautiful user-interface that conveniently allows you to directly edit the expression or if you prefer use the visual key pad to enter new expressions. There is support for over 20 math functions.
Version 1.4 allows to define your own functions with ease.