I only saw the app once while scrolling around on f-droid; tried it but it seemed too empty to be useful. The only place I’ve since seen it even being mentioned is this post, but that’s also not specifically about the app. I’m genuinely curious about what exactly the point is of GNU/Jami. Is it just a p2p version of calling and messaging?
One other thing I forgot to mention - transparency of the lead developer and service provider is overlooked, imo, as a criteria for picking a secure messaging client. That background information on jami wasn’t terribly clear to me when I looked a couple of years ago; it does seem better now.