title: How to android app from scratch from an existing android app?
body: <p>I have already published a Android App on Google Playstore. Now I want to revamped my existing app. I am developing my app using Android Studio.</p>
  
  <p>I want to know what things should I kept same from previous one so that when I will publish revamped App on playstore it goes as a update to users? Can anyone please help me?</p>