Nothing wrong with using it but I would have a stand alone GPS.
Actually depending on the app you can cache the map of the area you'll be hunting and it will work without cell coverage as long as you leave your wifi on, most of these newer smart phones have GLONASS at least on the iPhone 4s or higher does this allows for GPS tracking out of cell coverage. I use my phone a lot in areas without cell coverage.
Good info Woodtick. I didn't know they had the GPS chip in the iPhone. Thanks for the info.
The biggest thing is having an app that will actually allow you cache map areas, I've been using one from OnXmaps and one called GPSkit. They both allow caching, onXmaps is free but limited unless you start purchasing maps from them, they make all these hunt maps you see for GPS's and you can get landownership and all that stuff with their "purchased" maps. GPSkit is about $9 and it doesn't have landownership data but it does have some pretty good stuff with it, it'll track mileage, let you set way points and show ascent/decent on another output screen, plus you can set your cached map to be either topo, satellite imagery or both. I've been told you can take your tracks and download it to GoogleEarth but haven't played with that yet. I only take my GPS when I need land ownership boundaries cause I bought a bunch of miniSD's before I started playing with the iPhone
I strap this bad boy on to my pack and charge everything in my pack while I'm hunting
