I want the compass to work for other reasons, but I haven't spent enough time with the Revic to even know if this is possible.
When I have an animal down, sometimes a bearing and range to the animal can be very useful to me in recovery efforts. Sometimes we don't walk directly to the animal, having to back out and cross the canyon elsewhere and maybe spot a recovery SxS nearby, etc. before getting to the animal.
So if I have a bearing and a distance, I can fire up OnX and drop a pin darned close to where the animal is located. This is a manual way of duplicating the Tracking Assistant feature present in Swaro ranging binos.
I have done this before with my old ranging solution (Leica Geovid binos), using OnX topo features and sat imaging to approximate the location of the downed animal because I didn't have a bearing available.
Used this method to walk in the dark to within 20 yards of an Elk one of my sons shot last year at sundown. It was well after dark (1-1/2 hours later) when we got to the animal and boy I was thankful to know we were very close in that situation. Tons of blowdown and brush and it was a moonless night.
I also would like my phone compass to work, and the magnet may interfere with that.