Firechat is an app developed by Open Garden which makes use of wireless mesh networking to enable people to connect with each other with Bluetooth, Apple’s multi-peer connectivity Framework or Wi-Fi. Through their promise of end-to-end encryption you will not have to worry about the security of your private messages. Now the specifics suggest that this only works for nearby communication, however the amazing thing about Firechat is that the connectivity increases as more people in the area start using the app.
So think concerts, flights, festivals and holidays, now you have a solution to that dreaded fear of losing your friends and not being able to contact them. Firechat has also been used in protests situations where the threat of network shutdowns have at times caused people to download it in order to stay in communication.