Group chats, nicely working and with fallback for legacy clients. They are usable (without all features, of course) in Gajim/etc without doing anything:
Device management. Newly connected device is given a token, with a mechanism to prevent token duplication, and tokens can be revoked, resulting in device disconnection:
Web client: https://xmpp.redsolution.com/upload/4bddf4f264f5c6577f16551f...
iOS client: https://xmpp.redsolution.com/upload/4bddf4f264f5c6577f16551f...
Message formatting (from web client, but is supported by all, actually): https://xmpp.redsolution.com/upload/4bddf4f264f5c6577f16551f...
Device management. Newly connected device is given a token, with a mechanism to prevent token duplication, and tokens can be revoked, resulting in device disconnection:
https://xmpp.redsolution.com/upload/4bddf4f264f5c6577f16551f...
https://xmpp.redsolution.com/upload/4bddf4f264f5c6577f16551f...
This all is a work in progress, and we're aiming for an iOS version release in december or early next year.