Yes, I know that you've heard this before. It is the Facebook app that tells you, they have the ability to check who's viewed your timeline profile named "Pro Seeker". Just like an earlier scam apps, this app has almost the similar message that send to your timeline randomally and automatically from your friends who already been a "victim" by clicking on that link. Just like what happened to my timeline profile a few days ago that I got it from a friend of mine even twice, however after I confirmed to her about the link she sent to me, she claimed that she never sent it to me in any other way. Just to let you know, here's the message of the scam.
New Update From Facebook. Big thanks to the Facebook team for finally giving us something to check who's viewing our profile. Check Your Top 10 Friends Who's Viewing Your Profile>>> http;//apps.facebook.com/hgjfgvdfc/
Without I click on its link, I pretty sure knowing this app is a scam, how I can tell you this app is a scam? the answer is simple, it's because Facebook doesn't allowing any app or third party that claims enable to know who's viewed your timeline profile it's forbidden and it's scam. For further more about this explanation you can visit this link what Facebook Help Center tells you about it.
Q: Can I know who’s viewing my timeline or how often it’s being viewed?
A: No, Facebook does not provide a functionality that enables you to track who is viewing your timeline, or parts of your timeline, such as your photos. Third party applications also cannot provide this functionality. Applications that claim to give you this ability will be removed from Facebook for violating policy. You can report applications that provide untrustworthy experiences.Well, then what should you do next after knowing this app. A simple way is that you can ignore it and help your friends by telling them the truth about this app, then you can report any app that it contains a scam in here to Facebook App Center.