title: How to launch already installed app from iPhone using appium
body: <p>I am writing an automation script using Java + TestNG + Appium.</p>
  
  <p>In a test scenario, I am trying to launch already installed application on iphone. (Box in this case). Box contains some MS office file which I need to access. 
  I am not very sure how can I achieve this.</p>
  
  <p>I tried multiple options such as extracting .app file from iTunes and deploying using Appium, but no success.</p>
  
  <p>Can someone please guide me, if this is possible. If yes, how?</p>