This is an app to watch movies with your Cardboard VR. In fact the application does not seem to work with motion sensors, so it is ideal to lie down, get headphones and watch a movie. Just make sure that the video is compatible with VR glasses and has the appropriate format, if not, it looks a bit weird.
It currently only supports videos that already have been downloaded previously to your smartphone. But it works with the remote control to access the menu while the device is equipped. It has also an option to use the phone camera while wearing the cardboard, it makes reality looks like VR 😛