lxsw20:
Android Auto would work with the Android phone, and Apple CarPlay with the iPhone. It's worth it. I never use my car's inbuild maps, when I can have live traffic etc with Google Maps.
You can download your areas maps to keep the data use lower too.
that would be my issues then as wife and myself use different phones (apple android)
downloading the maps i guess will be saved on the phone and not the car....is that right?