Trapster is the most popular driving related mobile app in the world (both in cumulative and ongoing daily downloads). It is the first location-based application that alerts users in real-time when they approach speed traps or red-light cameras. It takes advantage of user input and the power of the community to provide not only the trap information, but also to arbitrate the veracity of that information. It also provides turn-by-turn directions, real time traffic, accident reports, gas stations, banks, rest stops, local search, and more. Trapster is free.