I release an app on the alpha channel and one user for testing but it only shows as unavailable no other details showing, please help me how to install and run it.
Hmmmm, maybe in the Uninstalled section of your Library?
Also do you have a dev version already installed via Osig...if you have then maybe its a conflict and you need to uninstall that version first (this was a thing on GearVR I know).