Meet the Vaavud Sleipnir: a wind meter for your smartphone that lets you measure wind speed and direction with your smart device. It has two curved blades and an internal optic sensor that records 44100 measurements per second. The Sleipnir lets you take accurate wind readings at speeds from 2 – 40 m/s.
You will be able to see data captured by other users on your phone. This compact tool is available for $60.