FunCAD is an amazing graph plotting app for Windows phone. It can do all kinds of stuff, like drawing 2D, 2D polar and 3D graphs (all with time, animated). It can even play a function as sound! Features: - 60fps even on lowest end hardware - 2D animated graphs (cartesian and polar) with lots of options - find special points (x,y-intercepts, intersections, stationary) - 3D animated graphs with really big resolution and intuitve pinch to zoom - 32 gradients to pick from (for 3D graphs) - Sound rendering - Runs under lock (for sound, optional) - Live tile (under development) . . Ability to set user constants. Added trial. better review suggestion. added about page.