It would be cool if it included sample OBJ files to entice me to find my own later. Otherwise I feel like I just hit a wall immediately in the app will probably not try it again.
Specifically I tried this rook from this chess set. https://www.thingiverse.com/thing:5994219/files
Sadly, some of the crenelations on top of it are just cubes with 2 sides missing that would be impossible to attach to the folded up rook. I imagine there is a ton of loss between a file for a 3D printer, a random convert to Obj with no settings, and this net maker, so I'm not unsympathetic to the problem. It's just that this is a printout that would not be foldable into something useful.
https://www.thingiverse.com/thing:1078513/files
or this army tank...
https://www.thingiverse.com/thing:4618182/files
(n.b. under the main image viewer click the "files" tab to explore individual files/extensions)