Install the app then run it and point your android device at the sky and it will identify all the stars and constellation's as well as satellites.
Tap on a particular star or constellation and you get information about it.
You can do a full 360 spherical sweep, so you can see the stars below you too.
I have yet to try it on the VR headset, so if anyone has one of those, give it a try.

Why is Scorpio at the exact opposite to Orion.? I wondered about that too.....
Enjoy the app.......