I do infosec for a living and I’ll say security.
iOS is far from perfect but it’s a clear difference between the operating systems.
App Store is more tightly controlled which helps.
Hardware and Secure Enclave in Apple are just designed more security first.
Once again not saying it is foolproof or even awesome but there is a clear leader in the space.
Some of that has to do with the one vs many relationship of Apple vs android producers too.
Is Apollo in there