iSpeed Gun is described as 'Do you think that cars drive too fast where you live? Now you can finally check a vehicles speed, either coming towards you or going away, just like the police!'. There are five alternatives to iSpeed Gun for Android, iPhone, Blackberry, Android Tablet and Windows Phone. The best alternative is Traffic Speed Gun. It's not free, so if you're looking for a free alternative, you could try Real Speed Gun or Speed Gun. Other great apps like iSpeed Gun are IOYY Speed Gun (Free) and SoundSpeedGun (Paid).
This app is used to calculate the speed of moving objects. You can measure the speed of pedestrians, cars, bicycles and anything moving of Earth's surface. Before using this app you must enter your body height(in settings).
Speed Gun (Smart Speed) can measure the speed of a moving object by touch. Thera are several apps in the market. All of them are for the baseball. just ball speed. This speedometer can measure the speed of a moving object by touch.
For those who were always interested in how fast is an airplane flying around them, a car driving or RC model driving. Speed gun uses sound, emitted by moving object to determine its speed. It uses Doppler effect.