Mjolnir Wind Speed Meter - Green

You can use the Vaavud wind meter together with the Weendy app to tap into the world's fastest growing community based weather network.
The rugged, electronicless Vaavud wind meter turns your smartphone into a high-tech meteorological tool. 

Compatibility:
Vaavud wind meter works with all iPhones from 4 and up, all iPads from 2 and up running on iOS 6 or 7. Also, works with Samsung Galaxy S3 and S4, HTC one and Google Nexus 5. For a complete updated list of devices that work with the wind meter, go to www.vaavud.com 

Design:
The Vaavud design is inspired by professional cup anemometers, but with two cups instead of three, in order to make it pocket friendly. The one piece, molded rotor and the low friction Teflon bearing makes the Vaavud wind meter extremely durable. If sand or dirt gets inside the Vaavud wind meter it can easily be cleaned out with water. 

Vaavud App:
The Vaavud app gives you a clear overview of average, actual and maximum wind speed, as well as a real time graph And you can scroll and pinch-zoom on the graph, if you want to take a closer look at something. The unit of measure can be changed on the fly by simply tapping the screen
**New features will constantly be added to the app. Measurement history will be available soon, and much more will follow.  

Accuracy:
The Vaavud wind meter has a wind range of 2 to 20* m/s. Precision is the least of +/- 4% or 0.2 m/s. Because of the cup-anemometer design, the precision of the Vaavud wind meter is not affected by changes in wind direction (unlike a propeller based anemometer, which must point precisely up against the wind to measure correctly).