I've been on a mission to find a solid application to view Stereoscopic Cube map images rendered in V-Ray. I'm not sure how this guy does it, but the latency is so low that the performance on my old Moto X rivals the Gear VR with a brand new S6. Plus I can play this in cardboard and it looks great. Even with a full 18k image.
Holodeck Pro HD 360 VR Cubemap Viewer at Google Play market analyse