Good questions from the 2 above posts - We intend to sell the app for approx. $2.59 NZD or whatever the equivalent in local currency.
This should cover some of the development costs and ongoing releases but I suspect won't get anywhere near break even!!
The app is aimed to bring together weather stations from around the world and share as a 'community' - should you wish to be part of this community please submit your app - if not, please don't.
The app is not making calls on your own website / server - I am saving data at my end into a database everytime you process the php file and when someone views the app it is making a call on my server.
Hope this clears up a few things.
Thanks, Ben