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FireChat lets you text friends, even without a signal

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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.

With each new user that logs on, FireChat's range expands

FireChat works by leveraging one of iOS 7's lesser-known features called the Multipeer Connectivity Framework. The framework lets apps communicate with each other locally over Bluetooth or Wi-Fi, even without an internet connection. AirDrop works in a similar way, letting you send photos to nearby iOS users. Few developers have thus far implemented the technology, perhaps in part because there don't seem to be very many scenarios where modern tech consumers lack internet access. So Firechat's pitch involves chatting at sports games, trade shows, concerts, on the subway, or on an airplane — a set of obvious scenarios where cell service is poor or nonexistent. But upon further examination, the app's potential utility is much bigger.

FireChat could create facilitate texting communities in areas of the world with sparse cellular service or expensive SMS plans. This assumes, of course, that these places have enough access to even download the 4.9 MB app. Or, FireChat could find success in the lunchrooms of America. Like most messaging apps, FireChat faces an incredibly crowded market — but with its focus on local chatting that actually works, it could find itself filling an important, and perhaps even vital, niche.

The Verge
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