Now there is a fast and useful tool for calculating the wind components for takeoff and landing. Pilot Marco Crivellari developed WindSock primarily because he wanted to use it himself. When he discovered that other apps of this kind were non-intuitive and too complex to be useful, he felt that every pilot would benefit from using his app, so he set the price of WindSock at the lowest possible level, $0.99.
Find more information and view a demo video at http://members.cox.net/wind_sock.
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