Is there a 'virtual reality supported' checkbox for iOS? Only in pro?

I cant find the ‘virtual reality supported’ checkbox for iOS, does it only exist for android? I’m using unity 5.3.4f1 personal, perhaps its only possible in pro.
Is there anyway to enable this at all?

any advice would be great, thanks!

Oculus doesn’t support iOS for the Rift or GearVR so I wouldn’t expect that setting to work.