Speed Gun is a free lifestyle application developed by arius for Android devices. This app functions as a speed gun and displays the speed of the object in time after it starts moving from the specified distance until it stops. The unit of speed can be displayed in either miles per hour (mph) or kilometers per hour (km/h). The distance unit can be set to either feet or meters, and the initial distance is set at 60.5 feet, which is the distance from the pitcher's plate of baseball to the home base. However, users can modify the distance according to their requirements.

The app offers two methods for stopping the measurement. One is by pressing the button again, and the other is by detaching the button. The app is perfect for sports enthusiasts who want to measure the speed of moving objects while playing sports like baseball, cricket, or any other sport that requires measuring ball speed. Overall, Speed Gun is an easy-to-use and reliable app for measuring speed that can be a valuable addition to a sports enthusiast's toolkit.