3D Functions Graph plotter can render functions in 3D space. This free app can generate graphs to represent functions defined using a function in the form f(x,y) or parametric surfaces defined as x=fx(u,v), y=fy(u,v), z=fz(u,v) as well as spherical coordinates and cylindrical coordinates.
The x and y or u and v ranges to use when graphing the function can be modified.
There is an option to plot the x,y and z axis.
The function graph can be manipulated using pinch to zoom and rotated using touch screen movements.
Function definitions as well as a preview thumbnail can be saved in the My Graphs section of the application for later viewing.
The graph rendering screen has a button to share the graph (e.g. via email, google drive, dropbox etc). This is a great feature if you want to export a graph and include it in an external document or share it with another person.
3D Functions Graph Plotter also has a Gallery section where some interesting graphs are already defined with an accompanying thumbnail. The gallery contains graphs to represent geometrical shapes such as a cone, sphere, horn etc