Telegram came out a year earlier in that signal, and because immediately popular amongst young people and drug dealers in Russia
Love keepass, but I mean something different
A password manager that can keep passwords on one device, and use the passwords on the other, without the storing one being connected to any network, etc
Well working, good looking airgaped password manager
There are some, but they are mostly like proof of concept
Works for me on mull like that, same url