Haven't tried it at night yet, but looks promising. Ties into Google Maps. Hudway app delivers windshield HUD for driving | Crave - CNET
I posted a thread relating to an Android HUD app: HUD apps for smartphones | PriusChat It really does only work at night or in really dark areas. Otherwise, you will see the device reflected in your windshield as well which is annoying and distracting. Stretches of unlit interstate or highways work best. Roads with bright overhead street lighting not so much. Every time you pass under a light you will see the entire device, not just the screen, reflected in your windshield.
