Motion Sickness Is a Bug, Not a Preference

In 2013, iOS 7 launched with zooming icons and a parallax home screen, and within weeks the reports arrived: nausea, vertigo, migraines. For the estimated one in three adults who experience some form of vestibular dysfunction in their lifetime, animated motion isn't texture — it's a physical event. The inner ear says we're moving; the body objects.

Apple shipped Reduce Motion that same year. A decade later, the setting is respected by the OS and ignored by a remarkable share of the apps running on it.

Not all motion is equal. The triggers are specific: large elements sweeping across the screen, zooms and scaling transitions, parallax layers moving at different speeds, spinning and 3D flips, and autoplaying video backgrounds. Small, functional motion — a checkmark drawing itself, a button's press state — is generally harmless.

Which makes the fix surgical, not aesthetic. Honouring Reduce Motion means swapping sweeps and zooms for crossfades, freezing parallax, and pausing autoplay. The checkmark can stay. Your app doesn't get uglier; it gets stiller. Both platforms expose the setting as a one-line check, and a crossfade is cheaper to build than the spring animation it replaces.

The wider point is the issue's refrain: 'accessibility setting' is a misleading name for what is really a contract. The user has told your app something true about their body. Every animation you ship after that is either honouring the contract or breaching it. There is no neutral.