FireChat is a messaging app that lets you chat with others without a connection — Internet or cell. Thanks to an iOS 7 feature called Multipeer Connectivity Framework (MCF), the app tethers you to devices around you and sends messages directly via Bluetooth and Wi-Fi Direct. As its name suggests, the Multipeer Connectivity Framework (also known as mesh networking) makes use of multiple iOS 7 devices (or peers) and creates bridges between them.