We all know Signal, Matrix, Telegram, SimpleX, etc… But if you can’t access the internet you can’t communicate. Pretty logic. But would it be possible, at least theoretically, to create an app that permits to message people even if the internet goes down?
It might be a dumb question I really have no idea to be honest.
Besides the already mentioned Briar, there’s Berty, can’t speak to its quality since I never used it, but I always found the project neat in and of itself