I would say that iOS is clearly more secure, private and reliable than OS X is. Apps on Mac OS X can absolutely screw up your machine. Adware in particular is

I would say that iOS is clearly more secure, private and reliable than OS X is. Apps on Mac OS X can absolutely screw up your machine. Adware in particular is a big problem for novice OS X users (speaking first hand here, having had to support these users). That’s an exceptionally rare occurrence on iOS. I’m comfortable with the security model on macOS, but would be very concerned if that same model were applied to iPhoneOS, where users (myself included) carry significantly more private information. On my phone, I want applications to have access to as little private information as possible, even if it’s detrimental to functionality. Call me a security nihilist, but security and privacy is by far my #1 overriding concern on mobile platforms, given the wealth of personally identifying information these devices gather. More succinctly: the threat model on mobile devices is not the same as the threat model on personal computers. It’s inappropriate to apply the same security to both platforms.