iPhones don't use/need AV because everything is vetted in the App Store -- that's the major benefit of the walled garden approach. Unless you're jailbreaking (because you don't like the restrictions of the walled garden), because then you're on your own.
“iPhones don’t use/need AV because everything is vetted in the App Store — that’s the major benefit of the walled garden approach.”
Yes, I already understood that. There is no danger of installing apps infected with malware. Same idea with Linux repositories. However, I’m not convinced that any browser is 100% immune from some type of exploit on a dangerous website. BTW, you don’t have to go looking for danger for it to find you.