I think of Nostore but it seems like it only works in Safari:

https://apps.apple.com/us/app/nostore/id1666553677?platform=iphone

You can typically find most Nostr-related tools here: https://nostr.net/

Not yet! Although I need to investigate further and search calmly... I use an iPhone but my complementary activities like posting and commenting on S.N I do from my laptop💻

I’m not aware of any. I’d love one though.