As a photographer, the reviewer is a "serious amateur."
This program has the capacity to do a nice job in sharpening your photos without introducing much noise (grain), at least on the relatively small iPad display.
But it needs an immediate repair/update, and I mean NOW.
The problem is that when it loads a photo out of your photo
library, it BLURS YOUR PHOTO. Consequently, a lot of the sharpening you are doing is fixing blur that wasn't in the picture in the first place!
Moreover:
I used the app to load photos and several times, with several photos, said, "hmm, this looks soft," and so I sharpened it. But then I pulled the original up with the default photo app or photogene, and found that the picture didn't need to be sharpened, it only looked soft when called up in in this sharpening app because the app blurred it. So I wasted quite a bit of time.
Also, how you can compare the original, right out of your photo library, with your optimized revised photo (as advertised) is beyond me, and I used the app or an hour.
I think if this app pulled up accurate renditions of your stored photos, so you could see exactly what and how much you were sharpening, and if indeed it let you compare your original photo with your edited one, it would be great.
One other important point. The iPad has a touch screen. Why not take advantage of it and let users selectively sharpen specific parts of a photo? Some other photo apps allow feature this, all should.