Nearby Friends is a brand-new feature in the newest version of
Facebook's Android app. Using GPS, it shows the approximate location of
your friends, grouped by city. It's similar to Apple's Find My Friends
feature, which uses your phone's contacts and GPS to plot your friends'
and family's locations on a map.
Once you set it up, you'll see a
list of other friends using Nearby Friends and their approximate
locations. It'll say what city they're in and a general location, such
as a neighborhood, if available. You'll see how far away, in miles, they
are from you, and how long ago, in minutes, they were in that area.