Well it isn't exactly a perspective change her, it's actually a keystone adjuster, you can make it do exactly what you want. It's more flexible than some of the other apps I've looked at. My only suggestion would be having some kind of auto perspective adjustment, such as swiping up or down or left or right and adjusting the picture automatically. As it is, you have to adjust each corner individually, and it takes a little trial and error to get it. that's a minor thing, and the results I'm getting exactly what I wanted anyway.