No camera rotation on Android (5.1.1f1)

I'm experimenting with the new Unity VR support using an Android 5.1.1 phone and the newest Unity 5 version (5.1.1f1).
This is my setup:
I've created a scene and added a camera as a child of an empty gameobject. On this gameobject I have a little script for rotation itself

protected void Update ()
{
transform.rotation = InputTracking.GetLocalRotation(VRNode.Head);
}

If I install this on my Android nothing happens. I just see a 3d picture of my scene (using a Google cardboard) but no head tracking.

Am I missing something?

 

Nobody?

 

You need to install official Cardboard SDK for Android and/or iOS.

 

Thanks for answering!
Do you think it's possible to combine the native unity vr support with the head tracking from the cardboard sdk?
Because I tested the camera with the vr settings on and that works fine, so I only need the head tracking to make it work

 

You could just use the native device gyroscope to rotate cam

 

Hi ina, how would I go about doing that? I'm very interested in using Unity with Google Cardboard, and I've seen many examples in the play store, so it has to be possible somehow?