I have gone to only using my phone.....until lately my frustration with OnX and tracks, using the phone in bad weather, phone battery life, bright sun situations.....I'm seriously considering upgrading my old Delorme InReach to a Garmin 67i just to get buttons I can operate with gloves on, a more rugged device and a screen (albeit small) that I can see in any condition. Maybe I'm just old fashioned but a dedicated GPS device just works better in my opinion. Phones are just too fragile. I still have a use for OnX on my phone and will probably use both in the field but instead of carrying my phone and a satellite device I think I'd be happier with a GPS unit with satellite communication and my phone. One backs up the other in a lot of ways.