Mobile Accessibility: Building Apps Everyone Can Use in 2026

Screen readers are the primary assistive technology for blind and low-vision users. In React Native, the accessibilityLabel, accessibilityHint, and accessibilityRole props control what VoiceOver on iOS and TalkBack on Android announce to users. Every interactive element needs a clear, concise label that describes its purpose, not its appearance. A button that deletes an item should be labeled Delete item not Red X icon. Use accessibilityHint sparingly to provide supplementary information about what will happen when the user activates the element. Group related elements using accessible containers to reduce the number of swipe gestures needed to navigate your interface. In Flutter, the Semantics widget provides equivalent functionality.

Many users with low vision rely on larger text sizes configured in their device settings. Your app must respect these preferences without breaking layouts. In React Native, use the allowFontScaling prop thoughtfully — disabling it entirely is an accessibility failure, but you may need to cap maximum scaling for certain UI elements to prevent layout breakage. Design your layouts using flexible containers that accommodate text at 200 percent of the default size. Fixed-height containers are the most common source of accessibility bugs because oversized text gets clipped or overlaps other elements. Test your app with the largest text size settings on both iOS and Android.

WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5 to 1 for normal text and 3 to 1 for large text. Use tools like the Colour Contrast Analyser or built-in Xcode accessibility inspector to verify your color choices meet these thresholds. Never rely on color alone to convey information — always pair color with text labels, icons, or patterns. For example, form validation errors should include both a red border and a text message, not just a the change. Support both light and dark modes with accessible the palettes in each. Many users with photosensitivity prefer dark mode, but dark mode introduces its own contrast challenges.

Users with motor disabilities may have difficulty with precise touch gestures. Apple recommends a minimum touch target of 44 by 44 points, while Android Material Design suggests 48 by 48 density-independent pixels. Avoid gesture-only interactions that require multi-finger swipes, pinch, or long press without providing alternative controls. Every action available through a gesture should also be accessible through a simple tap on a visible button. Implement keyboard navigation for users who connect external keyboards or switch devices. Provide adjustable timing for any time-limited interactions.