The feature works just as you expect. After installing the app and going through the set-up process, you have the option to mirror your entire Android device’s interface to your Chromecast, Chrome browser, or even Apple TV. Mirror also allows you to create a video recording of your Android screen.
Mirror lets you:
Create a video recording of your Android
Mirror your Android screen to Chromecast (Nexus 5 only)
Mirror your Android Screen to Chrome (Nexus 5 only)
Mirror your Android screen to an Apple TV
Of course, there are some bugs given that it is still in an early beta. Chromecast and Chrome mirroring is also only supported on the Nexus 5, as it’s the only device that has the required hardware video decoder for the app. You also must have root-access to your device and have the SuperUser app installed.
If you meet all of these qualifications, head over to Dutta’s Google+ page where you can sign-up for the beta and get access to the Mirror for Android app. Dutta hopes to release it, without root required, to the Play Store officially soon. Check out the video demo up above.