Ranging from Permanent (one arm), Temporary (arm injury), and Situational (new parent)

Touch: How would you design for users who have use of one arm, either permanently, temporarily, or situationally?

• Decide where to place buttons within your design based on several different hand sizes.
• Create a feature that allows double taps to avoid accidental icon clicks.
• Enable the one-handed keyboard feature and general keyboard compatibility.
• Allow button customization for easy access to information that the user finds most important.

Ranging from Permanent (blind), Temporary (wears glasses), to Situational (distracted driver)

See: How would you design for users who have limited vision, either permanently, temporarily, or situationally?

• Use a larger font to create a reader-friendly design of the app.
• Ensure the app and the images have alternate text that can be read by a screen reader.
• Detect whether the user is operating a motor vehicle.
• Design the app with high-contrast colors.
• Don’t rely on a text color to explain navigation or next steps. For example, don’t use red text alone as an indicator of a warning. Instead, your design should include explicit instructions.