RealCalc Scientific Calculator

RealCalc includes the following features:
* Traditional algebraic or RPN operation
* Result history
* Unit conversions
* Physical constants table
* Percentages
* 10 memories
* Binary, octal, and hexadecimal (can be enabled in Settings)
* Trig functions in degrees, radians or grads
* Scientific, engineering and fixed-point display modes
* Configurable digit grouping and decimal point
* Full built-in help
* A complete lack of advertising