iota calc

      Supports a rich expression format, which is in most cases identical to what you would type in your programming language. Support for adding unlimited numbers of variables. Built-in debugger that lets you see the expression simplified step by step. Debugger Back-step lets you backup as many steps as you like so that you can replay critical operations. C/C++ operator precedence Mouse optional, all calculator commands and functions can be done using the keyboard alone. Mini-Calc Mode lets your calculator take up very little screen real estate, and yet remain entirely usable.