The Apple A18 and Apple A18 Pro are a pair of 64-bit ARM-based system on a chip (SoC) designed by Apple Inc., part of the Apple silicon series. They are used in the iPhone 16 and iPhone 16 Pro lineups and the iPhone 16e, and built on a second generation 3 nm process by TSMC. Announced on September 9, 2024 and February 19, 2025, they are the successors to the Apple A15 Bionic (exclusively on the entry-level iPhone models with 4-core GPU), Apple A16 Bionic (exclusively on the standard iPhone models with 5-core GPU) and the Apple A17 Pro (exclusively on the premium iPhone models with 6-core GPU) processors, respectively.