OK but...
First you need to know how to view these. Its a bit of a skill to be learned. If you dont know how or you just have one eye, its not for you.
It does what it says it does. You can make custom 3-D images. But you must draw it with your finger which is hard. And you cant import any images of your own. Still it does what it says it does. It probably works a lot better on the iPad. But I only own an iPhone and its kind of tiny.
RiversideReviewer about
Draw 3D: a magical sketch tool