TWENTY ONE Companion 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) Workspaces: a second space next to the community relay, with its own channels Read the community's longform articles right in the app Create and manage your own meetups, events, courses, lecturers and places Join the association in-app: statutes, application and the BTCPay checkout for the annual fee — after paying, activation arrives on its own 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