If you have Windows 10, there is a good mapping program called "Maps". Look in Microsoft. Not much instructional information available (that I've found). More I use it the more I like it. You can download maps to use when not on line, although when on line, only the road view is available.
I also use 2 standalone Garmins. In addition to being able to use when not in cell range, they have tons more capability than any phone based system.