FlexiCalc is an improved calculator for the P800. Although the default calculator is pretty usable, it is missing some very important features eg. no way to write more complex calculations on one row. FlexiCalc is an advanced, multi-line calculator that supports editing of complex statements on one row. It supports basic trigonometric functions and two modes of input - using the buttons of the calculator and handwriting with the stylus. FlexiCalc is based on a calculator applet by Anthony Liguori and uses his parsing technique. Markus has added some new functionality as well as rewritten the GUI to make the application more usable. FlexiCalc is released under GPL license as was the original applet.