Nymchat (NYM — Nostr Ynstant Messenger) is a feature-rich, ephemeral chat
client built on the Nostr protocol, bridged with Bitchat for pseudonymous,
temporary messaging. No registration required — pick a nym and start
chatting instantly, or log in with an existing Nostr account.

Identity

Ephemeral sessions: generate a temporary keypair and pseudonym per session
Log in with a persistent Nostr identity (NIP-07, NIP-46, or nsec)
Optional identity encryption with password, PIN, passkey, or biometrics
Panic wipe: press-and-hold to instantly destroy all local data

Messaging

End-to-end encrypted 1:1 DMs via NIP-17 gift wraps (NIP-59)
End-to-end encrypted group chats with rotating ephemeral keys and
post-compromise recovery — relays cannot correlate group membership
Forward secrecy and configurable disappearing messages
Read receipts and typing indicators (per-scope: everyone, friends, or off)
Rich text (Markdown), emoji reactions (NIP-25), polls, and custom emoji
Peer-to-peer file sharing over WebRTC data channels

Channels

Location-based geohash channels (kind 20000)
Named topic channels (kind 23333)
Geohash Explorer: browse location channels on an interactive globe

Voice & Video

1:1 and group audio/video calls — signaling over NIP-17 gift wraps,
media peer-to-peer over WebRTC

Lightning

Send and receive Lightning zaps on messages and profiles (NIP-57)
In-app flair shop: buy cosmetic styles and badges with Bitcoin

Privacy & Moderation

No Google Play Services, Firebase, or trackers
User and keyword blocking, flood protection, image blur
Group roles: owner, moderator, kick, ban, transfer ownership

Customization

Themes: Bitchat, Matrix Green, Amber Terminal, Cyberpunk, Hacker Blue, Ghost
IRC-style or bubble layout, adjustable text size, wallpapers