Meet the WeatherFlow Wind Meter: a smart anemometer that pairs with your iOS/Android device to show you wind direction, speed, and other useful information. The device has a rugged design and is compact enough to fit in your pocket. Once you attach it to your smartphone and hold it up high facing into the wind, the Wind Meter will be able to transmit wind speed, direction, and location to your smartphone.
The Wind Meter has an app that makes it easy to share reports with others. Sets you back under $35 at this time.