This app. Really does not work that well at all. My iPhone is in an Otterbox Defender series case, and I had little luck getting it to work without blowing directly on the mic hole area. I have "Smule" installed, and I am aware of any wind interference that the case may present. This is not the issue, as that app works fine with all the subtlties of air as I use it. This app is just not working so I would not say its worth getting. Also if you see I am the only one to rate this in 2010 ! So that must say something. I hope that the developers can figure out what it is that is wrong. We all have cases for our phones, so I cant see that being the issue.
sunkist VW about Wind Meter