iOS has no concept of files (for the user). There's no common bit you can share between two programs. Of course, there are ways around this (Dropbox API for ex

iOS has no concept of files (for the user). There's no common bit you can share between two programs. Of course, there are ways around this (Dropbox API for example). I'd say removing this concept has probably made iOS a lot easier to use. The big danger with iOS is that it's also attack the open web itself. What if the catalog the author downloaded was only available in an iOS and android app and not on the web. That's when we really start to have problems.