I have stumbled into what has become a very confusing world of GPS navigation app choices for the iPhone 4. I have friends who use Android's 'speech recognition' search (I think it is powered by Google mobile), which is exactly what I'd like to use. However, where you can map it with Google mobile for iPhone, spoken turn by turn directions are not available. As someone who would prefer not to fumble with a handheld device if I'm on the road, it would be great to find a simple, non-battery wastin, low-maintenance app that would let me use my voice to find my end location. I am in the market, so it doesn't need to be free. Does this app exist?