khadinakbarlabs/expo-mobile-app-builder/accessibility-audit-android

Accessibility Audit (Android)

Pre-launch a11y check. Google rewards accessible apps with featuring.

The WCAG 2.1 AA baseline

• Color contrast 4.5:1 (text), 3:1 (large text + icons)
• Touch targets 48×48 dp minimum
• All actionable elements have content description
• Focus order matches visual order
• No critical info conveyed by color alone

Test with TalkBack

Enable: Settings → Accessibility → TalkBack → ON.

Navigation:

• Swipe right → next element
• Swipe left → previous
• Double-tap → activate
• 2-finger swipe → scroll
• 3-finger swipe → next/prev page

Walk every screen of your app. Listen to what TalkBack reads.

Common TalkBack failures

• Image with no accessibilityLabel → reads "image"
• Custom buttons without role → reads as static text
• Status changes not announced → users miss updates

RN+Expo accessibility props

<Pressable
  accessibilityLabel="Save habit"
  accessibilityHint="Saves your current habit"
  accessibilityRole="button"
  accessibilityState={{ disabled: !canSave }}
  onPress={save}
>
  <Text>Save</Text>
</Pressable>

Touch targets

Minimum 48×48 dp. For visually smaller buttons, add hit slop:

<Pressable hitSlop={{ top: 10, bottom: 10, left: 10, right: 10 }}>

Color contrast

Use these tools:

• accessible-colors.com — pick palette with contrast guarantees
• webaim.org/resources/contrastchecker/
• Material Color Tool — built-in contrast checker

Test with Accessibility Scanner (Android)

Install "Accessibility Scanner" from Play Store. Open your app, tap scan button → it audits visible screens and flags issues.

Common Android a11y gotchas

• Custom switches without state → just say "checkbox unchecked" not "switch on"
• Icons-only buttons missing label
• Image inside button → use single accessibilityLabel on button, mark image importantForAccessibility="no"
• Auto-focusing text fields breaks TalkBack flow
• Modal dialogs trap focus → use accessibilityViewIsModal (Android only)

Pair with

• apply-material3 (M3 has good a11y defaults)
• accessibility-audit (cross-platform shared)