Using ProPhotoMosaicCreator must be an exercise in extreme frustration. It takes forever for each step to be completed, if it does not hang on you. This is seriously bad because, writing this review in December 2019, I am using a brand new iPhone 11 Pro and still ProPhotoMosaicCreator hangs. Not only that, it further tests your patience to the limit by taking at least five minutes to render each mosaic image. And when you think you are done, saving the image to your iPhone’s photo album is another exercise in frustration. It sends the image to your email address and after many steps can you finally download your completed mosaic image. On average, it takes about 15 minutes from start to finish each mosaic image with ProPhotoMosaicCreator. It is really not worth your time and I am POSITIVE that the other previous glowing reviews are written by ProPhotoMosaicCreator’s developers themselves. If I could give ProPhotoMosaicCreator a zero, I would.