VR as a Sensor Fusion Method

Hello all!

I'm working on a app for tracking beacons (think: orienteering) in the real world using phones. The idea is that the user will be able to pull out their phone and then look around for the next point as though the device itself were a heads up display.

Amongst splitting hairs about not being smart enough to properly implement fusion techniques I tried out the VR aspects from Unity and found them fantastic! I'd just like to be able to use the internal methods without the split camera approach (I've got the rest, such as video etc. sorted out, and am sure the magnetometer will probably drop in without too much difficulty) but simply put: is there a way to do this, as the VR aspect of Unity seems to be only VR with little room for change.