WindowCE altready contains a calculator. Nevertheless, this calculator is quite a simple one and can make standard calculations like *, -, /, + and square root extraction. RealCalculator can do much more. It includes: • scientific calculator • function plotter • matrix-calculator • calculator for complex numbers • computer-calculator (hex, bin, oct, dec) • function calculator • numerical equations solver • statistic calculator • metrics-converter Apart from that, it pursues a different concept: Normally, all input is directly calculated, so you have problems with the sequence of your operations (e.g. * comes before -). RealCalculator stores all input in the input-field(s) and makes the calculation not until you have pressed the "="-button. All in all, this is a good scientific calculator, with a wide range of functions including some you won't find in other programs.