Vaavud Wind Meter Mjolnir (White)
The Vaavud wind meter turns your smartphone into a high-tech meteorological tool. Takes accurate wind readings, at wind speeds from 2 – 20 m/s (Up to 24 m/s on iPhone 5S and up to 48 m/s on some Android phones), with a precision of +/- 4%. It comes with a practical neoprene bag so you can take it with you anywhere.
Works with the following devices: iPhone 4, 4S, 5, 5C, 5S, 6, 6Plus – iPad 2, 3rd and 4th generation mini and Air – Samsung Galaxy S4, S3, HTC One, Google Nexus 5 and many more.