Hi,
I can design the wire frame for the app screens, the way/stye you want. I can also design the command-flow diagram if you want. Also I can design the real graphic screen UI. (not user experience)
I mostly do wire-frames for email newsletters, web pages, etc. But I was working as a GUI designer long before. See my profile, work experience and titles held.
Looking forward to work. Best
NOTE: I don't have an i phone.