Google Maps is the best on android phones but doesn't let you know about RV specific dangers like low bridges. RV Trip Wizard has the “RV LIFE GPS & Campgrounds” app but it's a little clunky. I prefer using RV Trip Wizard on my home computer and plan out my trips so I know the route doesn't have any issues Then I recreate it in Google Maps and send it to my phone via text message. Don't do it in "My Maps" of the Google map options as there is no navigation feature to that. Just use the regular Google maps and have the route texted to your phone. So far this way has worked great for me.