What app for traveling

[Happycamperscolorado]

i know that a lot of folks have garmin type gps/travel units in their tv for travel for mileage and maps and fuel etc…. . did not want to spend that kind of money yet so the question is " on iPhones, what apps are folks using if they are using apps for the same thing and what would be the best app for seeing fuel stop, campgrounds rest areas etc….." ? or are you using multiple apps for info

thanks