I don't use any regularly, but I do have Gaia GPS installed as a backup to a paper map, just in case. Before a hike, I'll download the map for the area, so I can use it offline. Occasionally, I briefly turn on the GPS and check my position on Gaia, just because it's easier to get to than my paper map (my pants pocket vs my pack). I've never used it because I was lost or bushwhacking, only to see how far I've gone, how much further to something (camp, car, water), etc. I think I've only had the tracking (recording) turned on once, not counting training hikes, and then I used it to check my pace as well.

EDIT: I just realized this was posted in the "Almost Over the Hill" forum. I generally try not to post here, since I'm just a young-un (pushing 40). But, you can feel free to ignore me if you like.