The Next Web writes, The milestones in the quickly developing story of App.net keep coming. Today has seen the first dedicated client for iOS hit Apple’s App Store. AppNet Rhino is a collaboration between two Croatian companies - Planet 1107, who coded the app, and Marko Prljic of TwinkleTap, who took on design duties. While it’s not the first iOS app to support App.net, social post scheduling app Buffer was updated to support the Twitter-like service, not designed from scratch. Anecdotally, a number of other App.net apps have been submitted to Apple for approval, but AppNet Rhino has won the race...