FireChat, An iOS App That Allows Users to Chat With Those Around Them Without Internet Access or Mobile Coverage
FireChat is an iOS chat app by developer Open Garden that uses the Multipeer Connectivity Framework built into Apple’s iOS 7 software to circumvent the need of Internet or mobile phone coverage when sending images or text. Essentially, the app makes use of this peer-to-peer Wi-Fi and Bluetooth capability to connect devices together without the need for a connection of that kind. The app works best in this “Nearby Chat” mode when within 30 feet of other users, and is currently available in Apple’s App Store.
via Cult of Mac