An important lesson I learned on my tour last summer was to plan routes with paper state maps, and use GPS/map apps only to stay on route or return to the route after a detour. When I was route planning using map apps, I found I had to be zoomed in too much for very much area to be shown on my screen, or I was zoomed out to far to see necessary details. Route planning with full size, paper state maps was quick and easy, by comparison.