Wouldn't it be great to give MacroHard, Google, Facebook etc. two fingers completely, with Linux OS and increased safety and security, from govs, corps, criminals and hackers... Well, if not completely, then at least in major parts of it all...
So, on my mobile phone I use Surhshark VPN, Tutanota and Protonmail encrypted mail services and now we may have a better solution for secure chatting - in THREEMA! Gonna try it now... ;)
Given Windows OS for mobile phones is 'off', so is Threema for Windows 10 - however, one can simply use Bluestacks emulator on Winblows and get Threema...
Downside? You may have to pay (a little!!!) but if you really value your privacy, in order to maintain the servers and development...
Be that as it may, it's only "pay once - chat forever"!!! And it really is next to nothing at £3 or $/€4 or so...
Good luck!
P.S. Worth considering: https://alternativeto.net/software/threema/ ???
