Everything old is new again... Repo description reminds me of the Shortwave app from the 2010s.
https://medium.com/@alonsoholmes/wtfbeacon-how-shortwave-wor...
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Seems like people in this thread are inspired by this novel concept that isn't novel at all.
FireChat was in fact used against dictatorial governments during protests in Iraq and Hong Kong. So it fits the aspired goal for the apps suggested here perfectly, and yet still failed as a product.