The thought process behind Fly is simple: Record up to four videos (either in the app or elsewhere), then bring them into the Fly timeline and use the app’s innovative multi-touch gestures to quickly sew together a fun little video. The emphasis here is on short (under five minutes), visual, musical videos; there’s no way to fiddle with adding text or time transitions. It’s a delightful little app, and it already has me sharing videos a lot more often than I used to. And that’s not even counting its Multi Cam option, which lets you feed in live video from other iOS devices running Fly.