They're using Xamarin, according to their showcase site. This video mentions before that, they had four different codebases for four different platforms: http:/

They're using Xamarin, according to their showcase site. This video mentions before that, they had four different codebases for four different platforms: http://www.youtube.com/watch?v=oETiK-v7rkE http://www.youtube.com/watch?v=oETiK-v7rkE so I'm guessing that means native development.