The one annoying thing about keychat is their model is that you don't use your public npub for chatting. Because of this, its effectively a closed system. It doesen't leverage your existing contact list, so you need to exchange new npubs to use it to contact any of your existing contacts.

Also, the app defaults to the keychat relay, but there's no good reason for it to do that accept that their relay implements the "I won't accept your messages unless you pay me for each one". This is all great in theory, however it seems silly when there are many free public relays that can be used inatead.

I love the idea of keychat, but its hard to get your friends onto yet another chat app when you have SimpleX and 0xChat