“Measure Your Serve: Tennis Speed Radar” is a legacy sports utility application originally developed by b-side software for the Windows 8 operating system (as well as Windows Phone 8).
The app was designed to transform a user’s Windows device into a virtual radar gun, allowing tennis players, coaches, and enthusiasts to measure and track the velocity of a tennis serve without purchasing expensive dedicated radar hardware. Core Mechanics & Features
Unlike expensive professional hardware that uses radio frequencies to detect speed directly off the racquet, this software relied on audio and manual user input to estimate velocity.
Audio-Based Calculation: The application primarily calculated velocity by measuring the elapsed time (t) between two distinct sounds: the racquet striking the tennis ball and the ball bouncing on the court surface.
Trajectory Mapping: Users had to input the estimated length of the ball’s trajectory (based on the distance from the baseline to where the ball landed). The app used the standard physics formula for average speed—distance divided by time (V = D/t)—to output the results in either miles per hour (mph) or kilometers per hour (km/h).
Progress Tracking: It included a logging history feature that saved previous serve speeds, helping players visually monitor their technique adjustments and power improvements over time. Current Status and Limitations Measure your serve speed without speed gun | Talk Tennis
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