CarWings on the Nissan Leaf is unusable. Its only advantage is that the map is built in and so doesn't rely on downloading. You can preload Google Maps onto t

CarWings on the Nissan Leaf is unusable. Its only advantage is that the map is built in and so doesn't rely on downloading. You can preload Google Maps onto the iPhone for say Point Reyes. You won't be able to find a route but GPS location and the map should be good enough.