Display almost any app on your HUD mirror, near your car's windshield Why? Even some pretty cheap new cars come now with a so-called heads-up display (HUD), showing various kinds of information on or near the windshield, so the drivers can keep their eyes on the road. For the other cars, there are devices that either show similar information in a similar fashion or simply reflect a phone's screen via a semi transparent mirror. You can even just use a phone's reflection in the windshield. An i