You have misunderstood. iOS and Android apps built using C# have access to 100% of the native API of the underlying platform. So all of the UI is fully native.

You have misunderstood. iOS and Android apps built using C# have access to 100% of the native API of the underlying platform. So all of the UI is fully native. Take a look at our API documentation on iOS, for example: http://iosapi.xamarin.com/?link=root%3a%2fMonoTouch-lib http://iosapi.xamarin.com/?link=root%3a%2fMonoTouch-lib You can see thousands of iOS APIs bound, including all of UIKit: http://iosapi.xamarin.com/?link=N%3aMonoTouch.UIKit http://iosapi.xamarin.com/?link=N%3aMonoTouch.UIKit