Do the facebook stalker apps for iPhones really work?

[Kay]

My friend has an iPhone and according to him he can see who views/creeps on his profile. I think it's a scam just like all of the other ones, but because it's an iPhone (and we all know how iPhones are notorious for having illegal apps) if it could be legit? Does anyone reading this have that app on their phone and if so, does it actually work? and not just with people who leave comments, i mean people who actually just look at your page and don't leave any posts.
Thanks for your answer. I'm aware that facebook has said that but iPhones are pretty amazing when it comes to hacking and doing things they shouldn't do! That's why I'm asking if anyone has it and can vouch for it and say it works?!