I tried the free version, and it was ok. A few quirks to figure out, but reasonably relaxing, except for the low resolution of the images, which I found annoying. Some of the images are more annoying than others, blurry, with jaggies and artifacting. I thought maybe just the free version used lower res images and if I bought the paid version and used my own high res images to create puzzles that it would be better. Not so. The created puzzle images are still low res with jaggies and artifacting. The silly magnifier bubble doesn’t improve the res. There are three choices in the app for creating puzzles from your images; but two of them are dumb. You can fit the image to the app window, or use original res, or stretch to fill the app window. These choices affect the display of the “zoom” action while solving the puzzle, and the final image displayed when the puzzle is completed. Only the first choice is useable, which reduces the res of the image for both puzzle solving, and final image to a res which is less than the size of the app window. So it does pixel replication on a device with a good display screen. The second choice creates a final/zoom image at the original res but zoomed into the center of the image, and the app won’t let you scroll or change zoom to see anymore of the image. Dumb. The last choice just stretches the image aspect like a fun-house mirror, also dumb. I can’t fathom what the developer was thinking with the image handling and why the app doesn’t use the full resolution of the display screen. This is really annoying with some images.