Have you tried Jabber with Conversations or Pix-Art android app? It has end to end encryption (OMEMO), support for sharing media, voice and video calling, multi

Have you tried Jabber with Conversations or Pix-Art android app? It has end to end encryption (OMEMO), support for sharing media, voice and video calling, multitude of desktop clients, (a less secure) web client etc. Most importantly, you can host the server yourself without cutting off from the network.