For a photo sharing app, Instagram has long been missing one key feature: in-picture tagging. Fret no more, pic-a-holics (or stalkers) – as of today's update to v3.5, the desire to find out who someone is a given picture is just got a little easier to satisfy thanks to the app's new "Photos of You" feature.

In a nutshell, it's just like Facebook's tagging option: upload a photo, go through the typical filter features and social options, and tag away.