When they say free antivirus for iphone, why are they asking for money?

ForumCategory: AntivirusWhen they say free antivirus for iphone, why are they asking for money?
Krish Mayani asked 3 weeks ago
Free antivirus programs for iPhone may offer users a free version of the program with certain basic cybersecurity protection features and may require users to upgrade to a paid commercially available version for additional features.