title: iPhone App can autolaunch after device boot?
body: <p>Saw an app called <a href="http://itunes.apple.com/us/app/phonerecover/id377626768?mt=8" rel="noreferrer">PhoneRecover</a> on the AppStore.</p>
  
  <p>They advertise the following:</p>
  
  <ul>
  <li>PhoneRecover will automatically restart after a reboot on the iPhone 3GS and the iPhone 4 running iOS4.</li>
  </ul>
  
  <p>How is this possible? What APIs are used to auto-launch an app after a boot?</p>