Now I'm back on the Garmin there is no data usage.
I'm new to iPhone and tried a few GPS applications like Waze, MapQuest, Commute, Scout Maps, CoPilot, iWay, Sygic, and Mapkin. I'm trying to decide which one(s) to keep.
A few of them are less accurate, you see your car icon off from the road and update the location slowly. A few are more accurate and constantly updated but I wonder if it uses more data.
Live and accurate traffic update; It seems each app displays differently on traffic conditions.
Uses less data: It seems some downloads the map on the fly. I wonder if they store the map somewhere so it does not need to download again if I travel on the same route. A few applications asked to download maps based on states. I assume this type would consume less data usage.
Thanks for your help,