I like the tech, and it's a good hunt.
There is similar software available for computers, but I'm not sure I've seen this available on mobile before (maybe, but not as sophisticated perhaps).
I'm not sure about the "several minutes" to generate the image, though. I could understand that kind of time-frame on older, less powerful phones, but many of the latest phones are more powerful than laptops of a few years ago.
This is a fun use of tech, and I would be interested, but not at $19...especially PER MONTH! $19 all-in would be expensive, but per-month is optimistic, I feel.