NativeScript is a free and open source JavaScript framework for building native iOS, Android, and Windows Phone apps, which you can use with Angular 2.0. But I know what you’re thinking: another way of building apps. What makes NativeScript special. Here are a a few cool things:. * Direct access to native APIs—no plugins required. Want to create a file on Android. Run new java.io.File()—in JavaScript. |--| * Completely native performance through the use of a JavaScript bridge natively available on all three mobile platforms. |--| * Cross-platform libraries for common use cases. Need to call a JSON API. Run "http.getJSON":.