Firechat is an app that works on peer to peer messaging and hence doesn’t need Internet or Cellphone network.
The Firechat app uses your phone’s bluetooth and creates a mesh network where every user act like a signal tower. FireChat creates a peer-to-peer mesh network that takes your message from phone to phone until it reaches the intended user. Message delivery limited to 70 metres, But it can be extended by joining more people. The more people use it the more range it can deliver the message.
This article was originally posted on https://techzei.com/chat-without-internet-using-firechat/