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by crossroadsguy 513 days ago
Depending upon which OS are on. If Android - Briar is the most famous and obvious choice. On iOS? There are not any options really but wasn't any usable one around a year back the last I had checked.

On iOS there are not many options for P2P w/o Internet (I assume that is what you meant - otherwise if you want P2P over Internet then there are some options although not really "truly" P2P of course - and of course if Internet is shut down or overwhelmed then it will be down). There's https://github.com/berty/berty (the last time I tried it was crashing incessantly but it might have improved). I do not know of anything else really (there might be few but I am not sure).