Tracking Marker Position Data (Virtual Camera Coordinates/Phones Position in the world)

Hi,

I am working on a iOS app which uses Vuforia to provide the app data about the phones position in the world. Now through all the research I did within the library itself and the forums, I am pretty sure (but not completly) that the transformation matrixes that the library uses to track the marker and know where the virtual camera is precompiled within the static part of the library and I am not able to get access to these coordinates (at least in the pure iOS implementation of this, maybe unity would have been easier :P) as well as hiding the camera view to dispay other things/views (with it still being active to actually use the AR). 

So my question is if anyone knows of a way I can have a blank/black view (ie. hiding the camera) with coordinates of the phone with respect to the marker in all three axis (x for left-right, y for up-down, z for in-out) being tracked and displayed? Is this possible to do with the iOS+vuforia lib or i need to go to another way of tracking the "virtual camera" by doing it in unity or going to another ar library (which one?) that has the transform matrixes of the marker for display available to the app code?

Thanks guys!