I'm not sure you're correct here. A developer can specify a particular package to launch Gmail or the stock mail app, something like: Intent intent = new Inten

I'm not sure you're correct here. A developer can specify a particular package to launch Gmail or the stock mail app, something like: Intent intent = new Intent(Intent.ACTION_VIEW); intent.setPackage("com.adobe.reader"); Would open the adobe pdf reader for instance. That said this is hardly desirable from a users perspective.