Trapster users share the location of police speed traps by simply clicking their mobile phones. It uses your phone's GPS and Internet to alert you as you approach reported traps. When you see a trap, report it by pressing a button on your phone, or calling a toll free number. Other user's phones will alert them as they approach the trap. Trapster® learns the credibility of traps based on how many users agree. It also learns the credibility of each user, over time. Available as a mobile app (Java) and also via iPhone store