I should note that I very rarely review apps (I can probably count them all on one hand). This app is fantastic. I've tried almost every claimed kaleidoscope app in the App Store, and nothing compares to this. Originally I bought the free version, but the upgrade was very much worth it. It's a very well made app; I've never had either the free or the paid version crash on me or even lag. It comes with 6 color filters (Vivid, Monochrome aka black and white, Faded, and Saturated) and 3 different styled of kaleidoscopes (the free version only includes 1). You can also adjust the Chromatic Aberratio (which is moving the color layers around the edges...it's rather difficult to explain, but I think you'll understand it when you see it). Absolutely worth it. I very rarely give out 5 star reviews (I have pretty high standards), but this app has earned them.