(NBC) - A new Facebook app helps you find out who your "friends" really are.
It scans your list of "friends" and notifies you if any of them are on the National Sex Offender Register.
In a world where more friends and more views helps you get your name out there, there's always the potential for danger.
But now a free Facebook app can scan your friends in seconds and tell you if your friends are registered as a sex offender.
Here's how it works: You type in friend verifier app on your Facebook search bar go to the page and click on the app. Then click "scan your friends," and within seconds any friends who match a sex offender in the National Registry will pop up.
People are shocked to see some of their friend's names match offenders.
The scan color codes results. Yellow means there is a name match. Orange means there is a name and a location match, and the red means your Facebook friend's name and location and date of birth matches a sex offender's.
The app has already been used 2.3 million times, and the creator based out of New York plans to expand it to Twitter this summer. Some say it's a great addition to the social media world.