They control all the hardware plus the software, yet the results are way more unimpressive than what I'd expect from that. I have bought an iPhone to port my game engine to iOS and setting it up was an unpleasant experience full of little annoying (although harmless) little glitches. Even LineageOS felt better that that, I honestly expected it the other way around - as I'm a Maemo user that got both Android and iOS phones only for development purposes, I tried them both at approximately the same time and could directly compare.