Nav-XL is the best free iOS and Android Truck GPS Navigation app, enriched with points of interest dedicated to truck drivers. Features are focused on the day-to-day imperatives of a trucking professional. The free Nav-XL truck GPS app is available on Android and Apple IOS. Nav-XL is not spelled Navixel, even though Nav-XL is actually pronounced Navixel. NAV for GPS navigation, and XL for truck size.