I have released the iOS Design Guidelines! iosdesign.ivomynttinen.com
You should read this before you do some work for free: buff.ly/1xkJME3 Personal opinion: just don't (no matter for whom).
I've published my 2014 stats of income, spendings and much more. Now I stop freelancing. Read more about it here: buff.ly/1zlgEMO