You can build a lot of functions in one time on same screen in different colors.
It has this features:
*zooming and moving by fingers
*nice and simple interface
*a lot of functions
*custom keybord with all stundurt functions(like cos, sin, tg, sqrt, ln, log and so on)
*others cooming soon
(aka graph generator, function grapher, function plotter, math grapher, graphing calculator, function generator, maths graph)