There is a <i>gigantic</i> amount of closed-source freeware available on the App Store. Literally hundreds of thousands of apps. Roughly zero of which have had any security scrutiny. Apple&#x27;s review process only checks user-visible behavior. (Edit: and a quick check for private API use, which is not user-visible, but nor is it relevant to security.)<p>If iOS&#x27;s app sandbox is inadequate, then those are all threats too, but Apple doesn&#x27;t seem to mind them. If the sandbox is adequate, then apps like f.lux are safe even if intended to be malicious.<p>Apple&#x27;s position is only really understandable if they don&#x27;t understand their own technology. Which considering who is probably making these decisions could very well be true.