The description is vague as to how it works. It appears to use stable diffusion (open source). Needless to say, it does not run directly on your device, but must connect to the Internet—the artwork is generated on remote servers. That means if the servers go down, the app will stop working. Still, you can get your money’s worth out of this quickly if you use it a lot. Fidelity to the prompt is not always very good. For example, i prompted “Tim Cook showing off the latest iPhone“ and it showed a knight, a cyborg and other things but none of the images looked like Tim Cook. In another app I use, all of the images looked like Tim Cook. When I requested “Rembrandt in the style of Rembrandt,“ it worked great, but when I prompted “Rembrandt painting a self portrait,“ it always gave me a “unknown error!“ On the plus side, the images are a lot higher resolution than they appear on your phone. If you download them to a device with a large screen like a computer, you will be able to enjoy them in their full resolution, which is pretty decent!