Twitter is such a simple service overall, but look at a few screenshots of these apps, especially the recent ones, and you will see some very different UI designs, not only in terms of visual style but in terms of layout, structure, and flow. I’m not saying it’s easy to write a good Twitter client. In fact, that’s the point — that it is not easy to write a good client for something as small in scope as Twitter hints at just how hard it is to write a good app for anything, let alone something truly complex.
