Just pay attention to there trails marked on the map we found several that are in the wrong spot this year in mt. Not to big a thing but makes me question the accuracy of public and private lands now
I use OnX in Alaska and California. I just downlad the area I am hunting and turn my phone &iPad to "airplane" mode to save juice. I also have an application the runs a GIS program on my devices that is tied into county land ownership databases. Overall, OnX has been pretty accurate compared to the GIS program. I carry a usb battery charger as I usually backpack hunt and run out of juice.