Accessibility - cognitive

Guided Access locks the iPhone into a single app and can disable parts of the screen, the hardware buttons, and set a time limit.

Settings > Accessibility > Guided Access

Triple clicking the side button, or the Home button on older models, turns your chosen accessibility features on and off instantly.

Settings > Accessibility > Accessibility Shortcut

Assistive Access replaces the entire interface with large buttons, high contrast and a small set of apps, designed for people with cognitive disabilities.

Settings > Accessibility > Assistive Access

You can set larger text, bolder text, reduced motion, button shapes and more for one app without changing the rest of the system.

Settings > Accessibility > Per-App Settings