title: iOS app versioning
body: <p>In iOS, what's the difference between:</p>
  
  <p>Bundle versions string, short AND Bundle version?</p>
  
  <p>What to update when building a new release and when ?</p>
  
  <p><img src="https://i.stack.imgur.com/YEXJR.png" alt="enter image description here"></p>