The latest upgrade to IOS 6.0 includes a new Apple Maps app that includes a GPS function with turn-by-turn audio and visual prompts. It's as good as anything from Garmin and in some ways better. The turn prompts are timely and the next-turn display is a perfect size for easy viewing. Routing often provides multiple paths to choose from. A great part is that it supports Bluetooth for the audio prompts that come through even when you're listening to music. It's a standard app at no extra cost. Works on an iPad as well, but that's too big to carry on the bike.