i am planning on making a home-brewing app for the iPhone. I know what your thinking. why? there's already several out there. not to mention the websites and desktop apps. well i've noticed that the vast majority of them deal strictly with beer and have little to no support for other kinds of brew. if i do decide to make the app i would want to have support for beer, wine, cider, mead and maybe sake.

what i was wondering was what features would you like to see in an app? what would you not want to see in an app? any calculations that would be convenient on brew day and just in general?