The Cardign app makes adding a person's contact information as simple as snapping a photo of them. Cardign, developed in Canada, allows you to not only get the name and email address of someone using only their photo, but it also connects you to their social media profiles.
In order to retrieve a person's contact information/social media profiles, they must be signed up on Cardign. If they are, the app will be able to recognize a photo of their face and will automatically sync their information to your phone. If you take a photo of someone who isn't signed up with the Cardign app, then you will have to manually input their information. You can learn more about the app, available for free in the Apple App Store, by watching the video.