Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
Kingpin Browser - Kingpin private browser is full-featured browser with incognito mode and adblock always turned on. It does not remember the history, passwords, or cookies.
Panda Antivirus for Mac - A bare bones malware and anti-virus scanner.
iTop VPN Browser - iTop VPN Browser is a VPN browser to defend against online threats. Surf the web safely and privately with the most secure browser with built-in VPN.
Clam Xav (desktop) - Specifically with Clam Xav Sentry configured to scan inserted disks.Please read global comments on this question for an explanation of why desktop apps are being recommended for virus detection on ios devices.
jQuarks - jQuarks is a LineageOS Jelly browser and ads Blocker app that has been developed to provide many features of a default web browser and also provides some other features like ads blocking and privacy guard.