The companion app for the TWENTY ONE Portal on Android: meetups, events,
courses, lecturers and places — right in your pocket.
- Meetups & events with a region filter
- Map of all meetups (OpenStreetMap)
- Courses & lecturers
- Group chat on Nostr (NIP-29) with Lightning zaps (NIP-57)
- Chat notifications without Goolag: your phone checks the relay itself in the
background — no Play Services, no second app, no push server in between. Off by default. - Built-in wallet: connect Alby / any NWC wallet, send & receive sats
- Amber offline mode: sign on-device via NIP-55, no round-trips
- Sign in with Nostr: Amber on-device (NIP-55) or a remote bunker (NIP-46, incl. QR)
- Offline-ready: the chat is cached on-device, recently loaded data stays available
- 8 languages: German, English, Spanish, Portuguese, Dutch, Polish, Hungarian, Latvian