My Go-to bird app

I have a couple of birding apps on my iPhone/iPad but this is the one I use all the time. It does everything I need, and Im sure there are features I havent even tried yet. It seems like every upgrade brings improvements. It works smoothly, has never frozen or quit on me. LOTS of information tucked away, but the layout lets you go to exactly what you want.

22andcounting about iBird Pro Guide to Birds