Finally, we are confident enough to invite interested users to test Keychat.
Keychat code: https://github.com/keychat-io
Keychat Android apk: https://github.com/keychat-io/keychat-app/releases
This...
So you can use Keychat also with classical NIP-04 DM encryption to chat with other Nostr clients. But the invitation is from a different pubkey than tgose normal chats.