tl;dr; “Multipeer Connectivity — NSHipster”

Using the cloud is great if you have an Internet connection... what if you don’t? New iOS devices can network without it! <br/> Nearby users running your app can discover each other. Nearby users running *different* apps could also discover each other! <br/> DEV: advertise/discover peers; send messages; transfer files; open streams; encryption optional. <br/> Games, communication, entertainment, utils… the innovation made possible will be eye opening. <br/> #internetofthings

Multipeer Connectivity at NSHipster.com

Kudos, Mattt. Big fan.