title: What will happen if iOS distribution certificate expired?
body: <p>I'm now submitting iPhone app to iTunes connect.<br>
  And I have a question about distribution certificate.</p>
  
  <p>What will happen if distribution certificate expired?<br></p>
  
  <p>Will apps which purchased by users stop running or crash after certificate expired?<br></p>
  
  <p>Or users can't install the apps or can't download the apps from App Store after expiration of distribution certificate?</p>