My son uses onX; but I don’t use any app at this time. I have been searching for an app that integrates a good rangefinder for long-range stalking (glassing). I would really like to place a marker where I last saw my target.
Can anyone recommend a hunting app that actually has rangefinder capability.

Please identify a few capable units and provide links.
I’d like to try them out.

I’m looking for a rangefinder that solves the remote target localization problem so I get the target location coordinates for plotting them on a map. Glassing for bear, moose, or caribou at 3Km across a stream presents a huge problem in finding where the target was when I last saw it. I think you can see the problem. If I can get back to where I last saw the target, I can get the job done from there. Also, such a capability would be good for marking river crossing points and marking game trails from afar. Using GPS alone is a pain; because I can’t always occupy the site to mark it.