Ok I purchased the Motion-X GPS application and took it out on an off-trail hike in Skyline WMA this weekend. I absolutely love the app and easily transferred all of my waypoints and tracks onto Google Earth Pro. This thing is seemless and I was even able to download the sat photos and terrain elevation before I went since the area is cell signal challenged.
There is just one problem ... I was out for 2 hours or so and it completely drained my iPhone (5) battery! This won't work ... I'm betting that Recon Hunt will do the same since it uses the iPhone GPS
I need something else ... perhaps a handheld GPS unit of some type
A map, a compass, and the knowledge of how to use both are invaluable. Phones are great for marking spots as are GPS units, but I never really on having soley those. The thing I do is turn off the wireless on my phone (or just turn my phone off) and then power it up when I want to mark a spot. No real sense in having it on all of the time if you don't have a signal.
Of course, this is just how I operate in signal-challenged areas (i.e. most of Jackson County where I hunt).
I would rather have a GPS with replaceable batteries to use as a navigation tool than a phone. The other thing you can do is buy one of the external battery packs that will allow you to re-charge/run your phone for an extended period of time. They are not expensive (~$50) but it is extra weight to carry.