I don't have any Apple machines to write software with, only the iPhone as a target device, but I do have lots of PCs, with lots of Microsoft running them. There is a product called DragonFireSDK which supposedly makes iPhone apps from Vs2005 written C programs, so I'll give that a try. The minimum cost so far is $250, without having written a single line of code yet.
Anyway, I have a program for my work that operates on their website directly, and then turns over stuff to the Android Web Browser (or whichever one you got installed.) I don't see a way to do that in quite the same way with iPhone yet, so that will be a puzzle.
Anyway, I've got most of the same functionality on iPhone as on Android, minus the Voice feature, and perhaps that can be arranged later, using iOS5.