Designed to be best handheld anemometer on the market, the WeatherFlow is compatible with iPhone, iPad, iPod Touch and all major Android devices. Download the free app and plug in your wind meter - it's really that easy. Hold it up high facing into the wind, and your phone does the rest, recording the wind speed (average and gust), direction and location. Share onsite reports with WeatherFlow, Instagram, Vine, Twitter, SMS, Facebook and email. View all of this crowd-sourced weather in a variety of free apps. Accurate in 2 to 125 mph winds.