A free app for Android, by Micro Inc.

This app provides a user-friendly interface to help you measure the current wind speed and direction. It’s useful for outdoor activities such as windsurfing, kite flying, mountain biking, sailing, or just taking a walk. It can also be used to determine the direction of the wind in real-time. 

It has multiple measurement options, which you can switch between according to your preference. You can choose from one of the following units: knots, meters per second, miles per hour, and kilometers per hour. It also has multiple ways of displaying the current wind speed and direction, depending on what you want to display.