The actual reason is rule 2.5.6 from the App Store review guidelines: > 2.5.6 Apps that browse the web must use the appropriate WebKit framework and WebKit Jav

The actual reason is rule 2.5.6 from the App Store review guidelines: > 2.5.6 Apps that browse the web must use the appropriate WebKit framework and WebKit Javascript. Sure, if Apple does the predictable thing and allows JIT compilation only for WebKit-based browsers, questions will be asked. But so far it has been impossible for anyone to just accept that tradeoff and publish a browser with their own engine anyway.