As explained in the link below, NONE.
The article begins with:
"You don’t need an antivirus for your iPhone or iPad. In fact, any “antivirus” apps you see advertised for iPhones aren’t even antivirus software. They’re just “security” programs that can’t actually protect you from malware."
- What's the best Antivirus for iOS?
- What are "Mobile Security" apps found on App Store for iOS?
The article begins with:
"You don’t need an antivirus for your iPhone or iPad. In fact, any “antivirus” apps you see advertised for iPhones aren’t even antivirus software. They’re just “security” programs that can’t actually protect you from malware."
iPhone security apps often include features that don’t help protect against malware, such as;
- Anti-theft features that let you remotely locate your phone—just like iCloud
- “Media vault” tools that can hide photos on your phone with a password
- Password managers, Call blockers and VPNs, which you can get in other apps
- Some apps may offer a “secure browser” with their own phishing filter, but those work similarly to the one already built into Safari