King of Backcountry Map Apps
I spent a lot of time comparing the feature sets of every topo-related map app I could find, and this app has more map sets and useful features than any other. Pricey compared to other apps (but you get what you pay for); cheap compared to Garmin offerings limited to one inferior map source. Has high detail old-school paper/raster topos, modern hit-and-miss vector topos, public land overlays (pro subscription), terrain shading (pro), web sync (pro), and much more. I use it regularly for route planning, overland exploration, and hiking.
General Grant about
Gaia GPS Classic, v10.9.3