If I buy the Pro version, can I download maps - have them on my device - and they will work if I have no cell service?
“Offline maps allow you to browse the map without internet connection. The route calculation requires you to have an internet connection, but the navigation itself does not require an internet connection, when using offline maps.”
We work on offline routing for a future version.
in other words:
You can store many pre-calculated routes on your device.
The App can guide you along those routes as you expect - completely offline.
But if you deviate from the route a new route can only be calculated with internet connection