Are you talking about zapddit? It’s not a “general use” Nostr client, but rather oriented at providing Reddit-like experience where you can follow topics (hashtags) and participate in communities. It is relatively early days for the app, but nostr:npub1ltx67888tz7lqnxlrg06x234vjnq349tcfyp52r0lstclp548mcqnuz40t is shipping new functionality regularly. For now the app redirects you to snort.social for interactions that are not available on zapddit.

For a more “general experience” I suggest you use https://satellite.earth which also supports communities.