You clearly did not check at all. Pubky does not work like Nostr. Nostr signs every message with the identity key. Pubky signs PKARR to publish identity + endpoints, then uses revocable sessions to authenticate to any homeserver/app. PKARR updates can be signed offline. The Pubky app is local-first. Network is for syncing/publishing, not for producing signatures. So comparing Amber offline signing to Pubky is mixing layers, and a misunderstanding of the design.

This is such a great response from someone trying to encourage usage of their app. Iirc there is the key ring and the main app. If I denied the keyring app network access, nothing worked.