I use backcountry navigator on a Sony Xperia Active (couple of years old, waterproof shockproof model). GPS works in airplane mode (as it should, its only receiving a signal not sending. Not sure why some phones don't) and has generally been pretty good, but has struggled at times in bush when a 62s was having no problems getting a lock.
I wouldn't go buying a smartphone over a dedicated GPS for that use, but if you have a smartphone already then its worth trying it out to see if it does the job well enough to spend your GPS budget on something else.![]()
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