FireChat is a messaging app that lets you talk anonymously to people within 200 feet of your location without an internet connection — but this “Nearby” mode was previously limited to showing chats from those using the same operating system. This was because the app used Apple’s Multipeer Connectivity Framework in iOS 7, but made use of its own mesh networking technology on Android devices. Today, FireChat has got an update that brings such offline chats cross-platform. The company behind FireChat, Open Garden, says this was made possible through the development of a peer-to-peer mesh networking technology across iOS and...

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