[eonil]

Such cross platform apps are meaningful only if your product doesn't need great UX. But the question is, if your app doesn't need it, why do you need a native app? It's better sticking to a web-app. Make a web-app and cover all platforms at once.

[UK-AL]

You can make any sort of UX in Xamarin. Xamarin.Android, Xamarin.IOS are just straight up wrappers to the real api.