Not all applications embed a UIWebView, and many that do also offer opening in Safari as an option. There are also between-app communications like Twitter's "Save Draft to Birdhouse..." or sending addresses to the Maps application. Not as flexible as the workflows you describe in Android, to be sure, but in that data is being passed between its apps, I believe it was overly broad to describe iOS as focusing only on "bite-sized" and "self-contained" apps.