I built an iPhone App to visualize my Home-Automation data (powered by WinCC OA – www.etm.at).

Because i did the same for iOS and used C# for coding (Xamarin Framework) i was able to share about 70% of the code between both Apps (iOS and Android). So there was no need to re-implement the communication and business logic!!

App: http://www.rocworks.at/wordpress/rocvmobile/