Nostr Chat
0xchat is a secured chat app built on the Nostr protocol. It prioritizes privacy with features like private key login, encrypted private chats and contacts, coupled with an open communication platform through public channels.
Website: https://0xchat.com/
Appstore: https://apps.apple.com/app/0xchat/id1637607169
Google Play: https://play.google.com/store/apps/details?id=com.oxchat.nostr
0xchat has optimized private messaging based on NIP04 to prevent leakage of users' real public keys (pubkeys) during private chats. This is achieved by implementing the NIP101 protocol, which creates an alias for users during private conversations.
0xchat proposes a method for message push notifications, includes the sending and processing of heartbeat signals to detect online status and provide timely push notifications.