Fumotrim Free:3D Block Modeler (com.fb.fumotrim.free) on Google Play
Fumotrim is a simple 3D block modeler for art, 3D printing, and game developing.You can create various 3D models easily.Free version does not contain advanced edit functions.Fumotrim's manual is here.http://fumobox.com/en/fumotrimYou can convert data to COLLADA or STL format.[Movie]How to make 3D printer data:http://www.youtube.com/watch?v=D-fF92HfKzQ