I like developing for iPhone & Co and so I like to present an new fireplace webapp at
This web-app calculates the amounts of heating energy of firewood and is espacially for those who like a cosy fireplace and those who wants to warm up their house on a cold winterday.
It's build for iPhone /iPad and safari or chrome (sorry no firefox or I.E.) and it's free (due to christmas).
I hope you like it.