You create the code for your app once, and that same code can be used for creating apps that work for iOS, Android, and Windows. Ext JS is an enterprise-grade product for building cross-platform end to end mobile web apps with HTML5 and JavaScript. Cross-Platform Mobile Development Services. Since it can handle both Android and iOS apps (although it does considerably less for iOS apps), it’s a solid choice for cross-platform app development. Like with all software, there are many different ways to go when developing desktop applications. A platform is an environment where programming code is executed. Programming languages are an ever-evolving species, with languages being created or used in different ways all the time. Universal Windows Platform allows making a single app for a different device with Windows 10: Desktop, Mobile, Xbox, HoloLens, Surface Hub, and others. C++ development isn’t as simple as with C# or Java. It started as a simple script language to add dynamic behaviour to web pages and now it is a powerful tool for building complex client applications (AngularJS, Durandal, jQuery).