title: What "kernel level C function" does Frenzapp use to detect running iOS processes?
body: <p>According to <a href="http://www.iphonedevsdk.com/forum/iphone-sdk-development/64426-detecting-installed-apps-frenzapp-does.html" rel="noreferrer">this iphonedevsdk.com forum post</a>, Frenzapp uses two methods to detect other apps installed on an iOS device:</p>
  
  <ol>
  <li>UIApplication canOpenUrl: to check
  if known custom URL schemas can be
  opened</li>
  <li>A "kernel level C function",
  that is "authorized by apple".</li>
  </ol>
  
  <p>What "kernel level C function" are they using?  Where is it documented?</p>