I bought a copy and gave it a try but it doesn’t work very well. In my brief testing it sometimes omitted portions of the image (e.g., if there was some text, half the letters would be missing).
Every file it generates needs a lot of cleanup. It has no concept of background color so on a typical black and white drawing it will generate a ton of white filled shapes.
Also, it only generates filled regions. It makes no attempt to find lines and generate stroked paths for those. That’s the one thing I’d find useful (to generate cut/score lines) but this program doesn’t appear to be able to do it. I’ve never asked for a refund on the App Store but I think I will in this case.
I prefer Super Vectorizer 2 which costs about the same. It’s not a great program either (it has a lot of shortcomings) but at least I find it useful for certain tasks. I usually use it in Line mode, with the Skeletonization option enabled, for converting line drawings to vector format. With some tweaking of the settings it often produces very usable stroked paths suitable for scoring/cutting.