Test Accessibility Font Sizes

Appetize supports easily testing various font sizes, ensuring compatibility across all your supported devices for a seamless user experience.

Overview

Dynamic font size testing is integral to crafting an inclusive and user-friendly app experience. It ensures readability across diverse devices, platforms, and languages.

By ensuring all supported font sizes work as expected, you enhance accessibility, maintain cross-platform consistency, and support inclusive design principles, contributing to a seamless and engaging user experience for all.

Android

Android supports the following font scales to be applied to the session:

Scale	Value
Small	0.85
Default	1.00
Large	1.15
Larger	1.30
Custom	Any Value (e.g. 1.75)

We can apply a font scale to our app or session by making use of the adbShellCommand to execute a font_scale change e.g.

Applying "Large" Scale

settings put system font_scale 1.15

Query Parameter

&adbShellCommand=settings+put+system+font_scale+1.15

JavaScript SDK

await session.adbShellCommand("settings put system font_scale 1.15")

iOS

iOS supports the following dynamic font scales to be applied to the session:

Scale	Value
Extra Small	UICTContentSizeCategoryXS
Small	UICTContentSizeCategoryS
Medium	UICTContentSizeCategoryM
Large	UICTContentSizeCategoryL
Extra Large	UICTContentSizeCategoryXL
Double Extra Large	UICTContentSizeCategoryXXL
Triple Extra Large	UICTContentSizeCategoryXXXL
Accessibility Medium	UICTContentSizeCategoryAccessibilityM
Accessibility Large	UICTContentSizeCategoryAccessibilityL
Accessibility Extra Large	UICTContentSizeCategoryAccessibilityXL
Accessibility Double Extra Large	UICTContentSizeCategoryAccessibilityXXL
Accessibility Triple Extra Large	UICTContentSizeCategoryAccessibilityXXXL

For the latest up to date list, see their documentation here.

We can apply the initial dynamic font scale by sending the content size category value as a launch argument to our session when launched e.g.

Apply Double Extra Large Dynamic Font Scale

[ "-UIPreferredContentSizeCategoryName", "UICTContentSizeCategoryXXL" ]

Query Parameter

&launchArgs=%5B+"-UIPreferredContentSizeCategoryName"%2C+"UICTContentSizeCategoryXXL"+%5D

JavaScript SDK

const session = await client.startSession({
    ...
    launchArgs: [ "-UIPreferredContentSizeCategoryName", "UICTContentSizeCategoryXXL" ]
})