Came across a great article - "Must Have RV Apps to Make Your Life on the Road Much Simpler."  

The entire article is available in the provided link, but here are some of the Apps mentioned:

1)  Walmart Parking App - Tells you where every Walmart is located and whether you’re allowed to park there overnight.

2)  Truck Stop App - Helps you find truck stops wherever you are, so you won’t struggle to find your closest stop anymore.

3)  RV Dump App - Gives you all the details about where to get repairs, fuel or stay overnight.

Others (free):  Google Navigation/Maps, Passport America, Gas Buddy, TV Antenna Helper, Weather Bug, Key Ring

Others (paid): Camp and RV Campgrounds Plus, Satellite Finder

Click Here to Read Article

Please contribute to this thread any Apps you have found helpful when RVing!