I need to build in an "optimal car-based route" feature in an iPhone app (initially for the US only). My understanding is this can be done for multiple stops on a route (correct?) But I'm not clear what plans offer what usage limitations (are the calls per day based on the app itself or based on each smartphone?). And I'm not clear what obligations we have as far as displaying a map (vs. displaying a text list of the route) and what attributions are required.
Can someone clarify these points for me?