via bitchat?

Yes, like the app came with a package so that in grid down no internet you could share the app

well, can't it be done via Bluetooth? only the download is slower

I don't know if my suggestion was retard or not 🤣

Briar does something like this, tried it once, was a little rough around the edges, but it worked.

Yes, it would be great, even needed for such use cases. F-Droid have (has? didn't try for a long time) this option to share the F-Droid apk over bluetooth and then host a kind of local repo to allow anyone on the same local network to download apk of the app you have installed, without internet.

Yes true, Briar is also able to do this and has worked over bluetooth for years. I would seriously prefer Briar over Bitchat for this internet-is-down use case.

I'm all for multiple options, but I'd agree in this case, Briar has been used in the field for years, and has all the necessary features. It's the only offline messenger that's ready to go right now.