Easy to use and free tool to plot functions and surfaces in 3D of type f(x,y). How to use it: - simply type the equation of your function in the provided field, click on OK, and a 3D graph of the function will be generated - you can then rotate, translate and zoom into your 3D graph to inspect it - in the settings tab, you can specify the axis size to generate the graph within your required interval By upgrading to the full app version you also get: - the app without adds - export to OBJ - sim