While driving our coach, we refer to maps on our iPhones, in addition to the built-in one.

To position the phones conveniently, we use phone holders from Amazon.

Jenn’s phone usually shows Apple Maps directions, in a holder suction-cupped onto the panel to the right of the AC controls:

My phone is usually showing either the RV Life GPS or Google Maps, while my Mac shows the Google Maps route. My phone holder is suctioned to a plate that is stuck on the edge of the pull-out passenger workstation:

It is easy to adjust them to the desired angle, or rotate them out of the way when not driving.