Just a post to say the goods of using SimpleX instead of others “private” messenger. First it doesn’t not require any id, phone number, etc… Can create how many accounts that you want! Decentralized servers, everyone can run and use own servers, and communicate with others! Big privacy side! Look at this one of the best https://privacyspreadsheet.com/messaging-apps. The only negative is the usability of the app, this is why it needs support and be democratize to gain attraits to people, and maybe one day be one the most used messenger app…
You can only use one device at a time. However you can toggle between mobile and desktop
That rules it out for me then. I like to use XMPP+OMEMO with about 4-5 clients which I can continue a conversation with at any time. Main mobile, tablet, desktop, other desktop, and backup mobile which is usually switched off. (Even if a device has been missing for too long and run out of OMEMO keys, the keys sync up again once I send a message with it.)