Apple supports 2 development platforms
1. Completely open HTML5 platform (p0rn companies are already adopting)
2. Curated App Store
#2 is not a development platform, it is a retail store. They support 2 retail stores, both of which are limited in scope. Which is downright offensive to some people, even though every single store on the planet is limited in scope. You can't buy p0rn at the Apple store, and you can't buy Apples at the p0rn stores. Horrible, horrible world.
They really only support 1 development platform, it's called Objective-C, if I am properly informed. And that is wide open, do whatever you can. (Apple just won't sell certain products for you at their own stores)
They just claim to like HTML5 for pissing matches.