FireChat sounds fairly conventional from the get-go.
It's a new iPhone app that lets you chat and share photos with nearby users — anonymously, if you so choose. But instead of relying on global positioning or cell tower triangulation to plot you and others on a map, FireChat relies on Bluetooth and Wi-Fi to transmit messages between nearby users.
In other words, you can open the app in the basement of your university library and chat with others, even if you don't have cell service.
With each new user that logs on, FireChat's range expands. "As long as there is a FireChat-enabled device to act as a node in the chain, there's really no geographic limit to how big the ad hoc network can be," creator Micha Benoliel tells GigaOm.
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