I use https://coracle.social more than most other nostr clients because I can use it from Firefox on my Ubuntu laptop, and from Firefox on my GrapheneOS Pixel. Also I use Alby firefox extension to hold my nsec securely and do all of the nostr event signing for me. (@npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm)

Ditch iPhone. Go with a Pixel + GrapheneOS.