Speedcam Anywhere is a British mobile application that lets users measure, with great accuracy, the speed of any car, just by filming it for a few seconds. Currently only available in the UK, it is, not surprisingly, proving somewhat controversial.
With this application, anyone can turn their smartphone into a mobile speed camera. To find out the speed of a car, all you have to do is point your mobile device camera at the vehicle and film it for a few seconds (in a stationary position, without following it). The film will then be analysed, and the vehicle’s speed calculated to an accuracy of about 3km/h.