Approximal

Hyperlocal augmented serendipity is here!

Approximal uses Bluetooth LE (Low Energy) to notify you when friends and people with common interests are nearby.

Find friends from Facebook, Twitter, Pinterest, GitHub, and more than a dozen other social networks.

Create your own networks for private groups of friends or public events.

Approximal waits quietly and efficiently in the background for notifications, without requiring a WiFi connection. If you're near someone in your networks, you'll be notified about each other.

Visit http://approximalapp.com for all the details.