Android: Recording your screen on Android has typically required either root access or complicated workarounds. As of Android 5.0, not only has that limitation been lifted, Mirror is now ready to take advantage of the new functionality.
Mirror's more than a one-trick pony, of course. It can also cast your screen to devices like the Chromecast or Apple TV. However, recording your screen to a video file is certainly the headlining feature. If you're not on Android 5.0 yet (and most people aren't), the app only works if you have root access.