title: How developers update their applications in Play Store? [Android]
body: <p>I'm considering publishing my application to Play Store. And since I don't have yet developer's account I would like to find some information before. <br>
  E.g. how developers could update their applications? Is it core feature of Play Store and developer should just upload new version of program with new version info maybe or developer should maintain updatable applications manually (by writting some additional code maybe)?<br>
  It's quite simple questions but really I can't google nothing about it.</p>