1. Altspace vr. https://play.google.com/store/apps/details?id=com.altvr.AltspaceVR&hl=en. Altspace vr. https://play.google.com/store/apps/details?id=com.altvr.AltspaceVR&hl=en.
2. Android mediacodec. https://developer.android.com/reference/android/media/MediaCodec.html. Android mediacodec. https://developer.android.com/reference/android/media/MediaCodec.html.
3. Battery historian tool. https://github.com/google/battery-historian. Battery historian tool. https://github.com/google/battery-historian.
4. Corridor. https://www.assetstore.unity3d.com/en/#!/content/33630. Corridor. https://www.assetstore.unity3d.com/en/#!/content/33630.
5. Daydream-ready smartphones. https://vr.google.com/daydream/phones/. Daydream-ready smartphones. https://vr.google.com/daydream/phones/.