iOS 18 featured a major redesign to the Calculator app, including fancy features like Math Notes. Those changes included adding a back button to the keypad, replacing the traditional C/AC button. This was so frustrating for some, the real hard-core Calculator users I guess, that The Atlantic published an entire column when iOS 18 shipped, decrying the button’s removal.
Apple has seemingly taken those complaints onboard. With iOS 26, the Calculator once again has a dedicated C/AC button.
