Unfortunately the Z3 Compact has a major bug affecting its use with VR apps.
If you plug headphones into the phone, it messes with the sensors, making it unusable for VR.
It might work with bluetooth headphones. If you have some, this is the headset you want:
http://www.gearbest.com/virtual-reality/pp_364129.html?wid=21
Hi, Someone in reddit suggested to install an app called CoolMaster and it did the trick. I now have 2 days of battery and little more. Its a free app and it really made my phone last waay more.