Every time this comes up, my response is always "Google Navigation." This app is essentially superior in every way to a stand-alone gps device. The only constra

Every time this comes up, my response is always "Google Navigation." This app is essentially superior in every way to a stand-alone gps device. The only constraint is that you need to have signal when you first request the directions. Aside from that I'd prefer it to any of the in-car systems that typically cost ~$2k. The biggest difference is that it accesses Google's index of places and businesses, and Google's ability to understand whatever mishmash of things I speak or type in.