When It comes Travel Apps I am hoarder.
For camping,,,,Good Sam, KOA, RVParky, AllStays RV. and CampFinder.
For Travel,,,,,,,,MyPilot for Pilot and Flying J travel centers, Truck and RV Finder this app will also list highway rest areas and Walmarts. and Blue Beacon truck wash. Yes I do use Blue Beacons because they have set up their washes to handle motor homes and travel trailers. TVTowers is a great app for finding the antenna directions, making it easy to aim the antenna ( for folks who do not have Sat TV.)
Google Maps is a definite favorite, along with Google Earth.
My most recent app is Nashville that gives great info for the upcoming Rally. And the CatScales app.
Bill G