It can snap photos on the road, so insurance companies have taken a keen interest in the app, according to iOnRoad.
The app is available on Android for $4.99. The Apple iOS app is coming soon.
It works like this. iOnRoad uses your smartphone camera, along with GPS and accelerometers, to approximate the distance to the car in front of you. If the time is decreasing rapidly, it means you might hit the car. That is when the app will give you a full collision warning alert with a loud beeping sound. It also lets the users set a velocity alert, so it can alert you if you're speeding.
It works in the background, so drivers can still receive calls and run other apps. It will even read your SMS messages out for you.
Watch Byte's executive director Larry Seltzer get a sneak peak of the iOnRoad app on the show floor at CTIA.