Monal connects directly to the IM server. There is no middle man to record credentials or conversations.
Old style SSL and new start TLS support provides the option to use encryption to protect conversations from eavesdroppers.
After logging in, Monal will keep running in the background and stay open until you decide to close it.
Monal supports joining XMPP MUC group chats. Group chats are almost seamless and look and work just like a normal one.
Monal will work with iOS VPN allowing connections even to corporate servers that aren't accessible on the internet.
As a matter of principle, Monal has no ads and no tracking software and never will.
Standard Jingle support allows voice over IP conversations with Monal and other XMPP clients.