title: Launching app from sms link or email link
body: <p>I have the requirement to launch an app when an sms or email link is followed. I have already been reading about URL schemes and already test that and it works, but the problem is that if the app is not installed on the device nothing will happen. I need a way to open a web url if the app is not installed, but I couldn't find a way of doing this...</p>
  
  <p>Any idea?</p>
  
  <p>Thanks</p>