A new app is being tested in Nashville, Tenn., that can check in people on Facebook and send them offers using facial-recognition cameras.
Called Facedeals, the new service uses cameras installed at businesses' front doors to read people's faces as they enter. If the people who come in are users of the app, they will be checked in, and based on their "like" history, they would receive a customized offer.
To use the app, people first have to sign up. The app will then work with users to verify pictures of them to get a better reading of their face.
Once that process is done, you can just go about your day and you'll be checked in any time you go to participating businesses, according to Redpepper, the company behind the service.