Repetitive prompts for 1Password account password on the iPhone

Thanks for the reply @CraigTorell.

The information stored in the Keychain is encrypted and only accessible to the 1Password app. It also doesn't leave your device. A hacker would have had to completely compromise your iPhone in order to extract this information and at that point it would likely be easier for the hacker to setup a hidden keylogger or screen recorder in order to exfiltrate data from your iPhone.

The settings that you mentioned only apply to the main 1Password app and not the lighter version of 1Password that is invoked when you fill inside of other apps. I do agree that this could be improved and we're planning to release an entirely new filling experience for Safari (unfortunately not Chrome yet since it doesn't yet support web extensions) when Apple releases iOS 15 in the fall. If you'd like to read more about what's coming you can check out our blog: WWDC21: Virtual Conference, Redux

I hope that helps. :)