Trapster(R), your iPhone alerts you as you approach police speed traps, red light cameras, and other kinds of traps.
It's a high tech way to do the same thing people have been doing for years with CB radios and flashing headlights at other drivers to warn them of a speed trap ahead. It works using the GPS and WiFi location capabilities of your iPhone 3G.
iPhone OS 2.x
||Compatible with iPhone.
Requires iPhone 2.0 Software update