You can't seriously tell iOS is not entirely closed just because they release source for two components under GPL. If they were able to stop using this GPL-ed close they certainly would.
Apple even stripped most of iOS related code for their MacOS open source drops. E.g they only recently started to release XNU source with code for iOS.
Re:iOS 11 Security [pdf]
by scarface74 on Sunday January 14, 2018 @07:52AM
(#16144057)
Two components? Darwin is a relatively big component.
But as far as Android.... https://arstechnica.com/gadgets/2013/10/googles-iron-grip-on...
If you can’t install your own OS on a device, that’s a closed device.
Re:iOS 11 Security [pdf]
by scarface74 on Sunday January 14, 2018 @09:12AM
(#16144302)
So that includes Android? How useful is Android to the average user without the closed source bits Googke provides and the closed source drivers?
How is Apple entirely closed?
https://opensource.apple.com