It doesn't request signing on just browsing, but yes it does sign app settings at intervals which is annoying, especially when what is signed is actually an empty JSON. Interactions such as posting, reactions, etc. always has to be signed.

What other nostr apps do you use? Is there one that is more like Instagram and less like Twitter?

Olas

I use Amethyst (can display short notes feed and media feed) on mobile and Nostrudel on desktop (browser) because of its versatility and clarity about relays interactions.