On the first iOS devices, Apple used ARM designs until they started using their own with the arrival of the iPhone 5, but have continued to use their instructions since then.
ໃນອຸປະກອນ iOS ໃນຕອນຕົ້ນ, Apple ໄດ້ໃຊ້ການອອກແບບ ARM ຈົນກວ່າພວກເຂົາຈະເລີ່ມຕົ້ນໃຊ້ຕົວເອງກັບການມາຂອງ iPhone 5, ແຕ່ພວກເຂົາຍັງສືບຕໍ່ ນໍາ ໃຊ້ ຄໍາ ແນະ ນໍາ ຂອງມັນຕັ້ງແຕ່ນັ້ນມາ.