Towards cross-platform development..
There are lots and lots of Apps. In fact there are over a couple of million Apps including all of the major brands, Apple, Google, Blackberry, Microsoft with Apple at the top and Microsoft in the bottom. But this is a growing market. The variety is truly bewildering, different size devices; different operating systems(OS); different programming languages; and different orientations. This post is not very recent but you can see how the various mobile operating systems compare: http://www.ibtimes.com/android-vs-ios-whats-most-popular-mobile-operating-system-your-country-1464892 The interactive image in the article really shows the popularity of a given OS/device among different geographical regions. Windows Phone Apps is for example based on Microsoft's Window 7, 8, 8.1 OSs using .NET. With Windows OS and Visual Studio one can build Apps for all of Microsoft devices covering Phone, Tablet and Desktop. However Microsoft Windows Apps sans Html5/CSS/Javascript is OS specific. E...