Mobile accessibility testing, also called mobile a11y testing, checks that a mobile website or app can be used by people with a range of disabilities. That includes blind and partially sighted users, colour blind users, people with cognitive conditions such as dyslexia, and people with limited finger movement.
Why it matters: A large share of screen reader users browse on mobile. Treating mobile accessibility as a separate, harder discipline often means it gets skipped, when a few adjustments to an existing desktop approach cover most of it.
In practice: Testers use the screen readers built into each platform, TalkBack on Android and VoiceOver on iOS, and navigate with touch gestures instead of keyboard shortcuts. They check that content is read in a meaningful order, images have useful labels, form errors are linked to their fields, pages zoom with a normal pinch, colour contrast is readable and navigation is consistent. Real devices matter, because emulators don't show how gestures behave.
Examples:
- Testing the same page with TalkBack and VoiceOver, since each reads content differently.
- Checking that a page can be zoomed with a pinch, without needing an accessibility setting.
Common pitfalls:
- Testing only on emulators, which hide gesture and screen reader problems.
- Assuming accessibility means blind users only, and missing contrast, readability and motor issues.
Is mobile accessibility testing different from desktop accessibility testing? Mostly in the tools and how you navigate. The same WCAG guidelines apply, but you use mobile screen readers, touch gestures and pinch zoom instead of keyboard shortcuts and browser zoom.
