It's not, it's a messaging app for iOS.
We already have Whatsapp, Facebook messenger, Snapchat etc, what makes FireChat different?
You can chat "off the grid", even if there is no internet connection or mobile phone coverage.
How is that possible?
Instead of relying on a central server, it is based on peer-to-peer ?mesh networking? and connects to nearby phones using Bluetooth and WiFi, with connectivity increasing as more people use it in an area.
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