Your iPhone is more than capable of acting as your navigation device. But you can always improve its performance by connecting it to a premium navigation device. Thanks to Redpark’s GPS Cable for iOS devices, you can connect your navigation device to iPhone 4/S, iPod Touch, and iPad. The cable is compatible with location aware apps too. This supports data rates up to 57.6 Kbps and requires iOS 5 or above to work. It will set you back $59 though.