NOTE: This is roughly obsolete, but may be helpful for historical purposes later. The issue is covered more precisely in XEPs and ClientIssues (though no mention of clients that do support jabber:iq:gateway is made - may want to add that eventually).
We need jabber:iq:gateway (XEP-0100#addressing-iqgateway) support in the user's XMPP client in order to get the full benefits of Cheogram.
Is the user likely to have this? Here's a survey (see also some historical details, summarized below):
- Conversations - not supported
- Gajim - supported
- Psi - supported
- Movim - supported