Smart Math Calculator 1.5

Smart Math Calculator is an easy-to-use math calculator that immediately computes the result as you type a math expression. It allows multiples math expressions at same time. It also allows defining your own variables and functions. It has a beautiful user-interface that conveniently allows you to directly edit the expression or if you prefer use a visual key pad to enter new expression. There is support for over 20 math functions.

Version 1.5 adds support for defining custom functions that call themselves (recursive functions) and support for true/false expressions.