Vehicle StampDuty calculator targeting WP, Android and iOS mobile devices using Xamarin unified api

I have redesigned my mobile app Australia Vehicle StampDuty calculator (originally developed using windows phone SDK) using Xamarin Unified API(C#). I have developed three mobile apps (WP, iOS and Android) with one code base and UI is common in all with some platform specific customizations.

I have published WP and Android apps in the stores but yet to publish iTunes stores and testing using cloud based devices.

Windows Phone