Not my app, but you could check out iCircuit's experience: http://praeclarum.org/post/31799384896/icircuit-code-reuse-the-fourth-edition http://praeclarum.org/p

Not my app, but you could check out iCircuit's experience: http://praeclarum.org/post/31799384896/icircuit-code-reuse-the-fourth-edition http://praeclarum.org/post/31799384896/icircuit-code-reuse-t... He achieves anywhere from 69-87% code reuse depending on the platform. They did a bit of a case study a while ago where Frank talks about it - http://blog.xamarin.com/2011/10/26/java-to-ipad-in-2-months/ http://blog.xamarin.com/2011/10/26/java-to-ipad-in-2-months/