Dear customer, thanks for your comment.
Please touch to "Load File" after starting. Then the standard file browser opens on the Smartphone. Now you can select and open a supported 3D file.
The file formats .stl, .obj, .ply, .off, .eoff, .xyz, .xyzn, .xyznb, .xyzc, .asc, .wrl (VRML 1.0) and .zip (must include supported 3d files) are supported.