Wow I had an idea similar to this back in college, couldn't get any co-founders interested in doing a proper startup sadly! iPhone accessory manufacturer had a

Wow I had an idea similar to this back in college, couldn't get any co-founders interested in doing a proper startup sadly! iPhone accessory manufacturer had a smartphone-OBD-II product called CarTrip which they discontinued: http://www.griffintechnology.com/blog/new/cartrip-and-cleandrive-app/ http://www.griffintechnology.com/blog/new/cartrip-and-cleand... As others have noted, you can buy the hardware yourself for pretty cheap: http://dx.com/p/obdii-bluetooth-car-diagnostic-cable-black-blue-orange-dc-12v-42825?rt=1&p=6&m=1&r=4&k=1&t=1&s=&u=42825 http://dx.com/p/obdii-bluetooth-car-diagnostic-cable-black-b... Combine it with an app like Torque...: https://play.google.com/store/apps/details?id=org.prowl.torque&hl=en https://play.google.com/store/apps/details?id=org.prowl.torq... ...or Rev and you've got some of the functionality already: http://www.devtoaster.com/products/rev/ http://www.devtoaster.com/products/rev/ edit: the advantage of Automatic is that it's an all in one solution for the mass market, rather than the DIY/car enthusiast nature of the existing apps and hardware.