I found a great little iPhone application at the weekend, an anemometer which works by measuring the sound the wind makes going into the microphone. I was a little sceptical about how accurate this can be but having a read around various forums seems to suggest it is amazingly accurate. The screenie below is from Wind Speed which is the one I’m currently using but I’ve found another one called Wind Meter too.

I figure this could come in handy if I ever start to fly model gliders again, worth £1.19 of my money any day!