Cool iPhone Gadget - Measure Wind Speed with your iPhone - Twister Alert!!

Twister Alert!! 

Vaavud Wind Speed Meter 

with iPhone App

Compatible with Apple iPhone, Apple iPad mini, Samsung Galaxy

Measures wind speed from 4 to 48 knots (2-25m/s)

Click Here to see it on Amazon

The Vaavud Mjolnir is designed to capture wind speed using two rotating cups along with internal magnets to seamlessly communicate with your device. Its unique design makes it pocket friendly and super rugged.