Black and white

Grayscale, on a triple-click

iPhone · Free · built in

What it does

Turns the whole screen black and white, so apps look less vivid.

Cost

Free, built into every iPhone.

How to set it up

Settings › Accessibility › Display & Text Size › Color Filters › Grayscale. Then Settings › Accessibility › Accessibility Shortcut › Color Filters, so a triple-click of the side button switches it.

How easy to get around

Very easy: a triple-click.

What the evidence says

In a study, grayscale cut time on the phone but not how often people unlocked it. Pair it with a schedule.

Worth knowing

For a lighter version that keeps photos in colour, see Plain icons.

Checked October 2026 · Source