Hi,the 99folks is an app to share contacts info like emails, phone numbers and social profiles with people geographically near through gps coordinates, it's like a Bluetooth list but you share only contacts info not files, and works using gps and internet, not bluetooth.

I am trying to understand the usecase. Exchanging contact deets, is that the only one?

Business cards can be hard to beat.

How is this different from Sonar?