In Google Play not so long ago there was a app that can turn your phone into an old-school business card holders. There are already quite a lot, but they adopted the design of new operating systems and "dip" into the past is unlikely to succeed.
iHolder immediately comes to interaction, but to start you need to register. After it scans your address book to find those already using it. If you can't find anybody, add contacts from the app or invite friends and colleagues to use it.