title: How to develop an in-app update for iOS and Android?
body: <p>How is that supercell's clash royale update it's app (features, content, etc) inside the app itself without going to the app store?</p>
  
  <p>Is it because they are supercell or is it possible to mere mortals to have an awesome in-app update experience like that? Any clue on how to do it?</p>
  
  <p>UPDATE: I know this can be done for javascript-framework apps (react, cordova, etc) I'm asking for non-javascript ones (xamarin, swift, obj-c, c++, native, whatever)</p>