Accessibility for apps
Some topics to be considered regarding accessibility specifically in mobile apps.
The material design guidelines recommend that “tappable” areas on touchscreens are at least 48x48 dp (9mm in physical size) even if the element displayed on the screen is smaller. Bigger touch areas allow users who can’t see the screen, have motor-dexterity problems or children to be able to tap UI elements.
It´s also worth noting that space must be allowed between different touch areas so users don’t activate the wrong element by mistake.
As a general rule apps should adapt to text size scaling without creating layout problems. Text size can generally be adjusted in the mobile device or browser accessibility settings. Another approach is building text resizing within the app if user needs and content type require it.
Test with accessibility features on
It’s important to test your apps with accessibility features and tools so you know how that impacts the experience. Have users with impairments test the app to identify critical problems.
Provide hints in addition to labels
Hints describe briefly the result of an action to clarify what will happen when users click something. Ex: a song is played by tapping its title. A hint is necessary here because the label will describe the song title, not what happens when a user taps it.