Fumotrim: 3D Block Modeler (com.fb.fumotrim) on Google Play
Fumotrim is a simple 3D block modeler for art, 3D printing, and game developing.You can create various 3D models easily.Fumotrim's manual is here.http://fumobox.com/en/fumotrimYou can convert data to COLLADA or STL format.[Additional features of the full version]-Export block size is unlimited-High resolution primitives-Additional edit functions: Copy and paste, Scale, Flip, Subdivide (high resolution)-Shift controller-Preference editor: Shift amount, Isometric image options-Surface viewer (old shader)[Movie]How to make 3D printer data:http://www.youtube.com/watch?v=D-fF92HfKzQ