Wind Meter allows you to know the approximate wind speed between 0 and 28 mph wherever you go.To use, press the start button. Wait a few seconds. Press stop. The final reading is the average of the period between stop and start, giving you an approximate average wind reading. Point the microphone at the bottom of the iPhone directly into the wind. Easily convert between mph, kmh, knots, and Beaufort. This application uses sound conversion to gauge wind velocity. As the wind speed increases, the application converts the louder noise on the microphone into a wind velocity reading.