I did download from Zion, an app of Web5 powered by TBD and tested some things. But I already have impressions:
-Backup seed (ID) style Nostr;
-To be content creator like on Nostr with Zap is necessary pay (12/mo), I understand by the model business of company;
-For enter in a community or group like on Nostr is necessary also pay for enter;
-UI/UX great.
Conclusion
The app have good UI/UX experience, however have barrier enter for new users (I understand model business) while Nostr is necessary only have private/public key