Usually Facebook APP applications are on Flash, so I donβt think it will work on iOS (please correct me if I am mistaken in the release of Flash).
On Android, this would be very simple, bearing in mind that it works with Flash with 0 problems. You just need to implement WebView on your layout and specify the URL of your facebook application.
In general, you can really create applications that work on both systems, iOS and Android, playing with webView. However, you should be aware that they will never work as if they were written based on native code in terms of performance.
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