You still need the reader, supplied in the app or not. I suppose the supplied one is only for the P4 app, because its not in the P3 version. Sorry about that. Honestly, I can't say what that specific QR codes purpose is for the P4. As I said before it could be anything from just text information, to a website link, email link etc..etc...I am just speaking in general about QR codes. You would have to ask someone who's scanned it to know for certain, or just scan it yourself. Then you will know. Peace!