This list is generated and retrieved from Facebook based on the following code:

Any activity you do on Facebook like messaging someone, liking a post ,commenting on a status, Visiting a profile, viewing someone's photos .... is triggering something in the code that changes the order of this list.

If you are interested in knowing who's viewing your profile you have to interpret this list and look for people who you haven't interacted with recently, those will be the ones visiting your profile and viewing your photos, you do the math and find out who might have a crush you.

Also be reminded that the list reflects what's going on, on your profile, i.e. if there are no new activities on your profile the list will stay the same until something new happens.

PS: Before you buy please note that we will do our best to keep this service running but we hold no responsibility if the app was taken down by Facebook.