You can connect a Daydream controller emulator app from Android (such as Galaxy S6) and iOS devices, not Android N on Nexus 6P, with small modifications of GVR scripts on Unity.
I described how to do that in the below page.
http://vr-cto.hatenablog.com/entry/2016/06/10/094938
(in Japanese: http://vr-cto.hateblo.jp/entry/2016/06/07/073000)
