Wow this is one of the nicest hunt of the day and with this small add on to the smart phone all the three component of wind like wind speed, wind direction (true & magnetic) and cross wind, headwind and tailwind can be recorded and reproduced through an app. I think this can get quite handy where the wind velocity is more and also cyclone prone area can be benefited with this app to a great extent.

Thank you and have a great day.