Ok, so from the link faramarz posted - Try putting this into the text box & hitting "Save":

  (1) Hello, world!
  [Go Home](2)
  [Go Elsewhere](3)
  (2) You went home!
  (3) You went elsewhere!

I've also found it'll take html links, though I haven't tried anything more complex.

It looks like the QR Code contains the whole script. The docs mention using it for step-by-step troubleshooting, etc - basically a self-contained instruction set for mobile devices. Not sure where the actual app for the phone is, though...