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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Accessibility Inspector(also: Xcode Accessibility Inspector)
A developer tool included with Apple's Xcode development environment that allows developers and QA testers to audit iOS, macOS, and other Apple platform apps for accessibility issues. The tool can run automated accessibility checks on a connected device or simulator, detecting…
Back Tap(also: Back Tap Gesture)
An iOS accessibility feature that allows users to trigger actions by tapping on the back of their iPhone two or three times. Back Tap can be configured to activate shortcuts, accessibility features, or system functions without requiring precise touchscreen interaction. For…
Braille Screen Input(also: BSI)
A built-in iOS accessibility feature that turns the touchscreen of an iPhone or iPad into a virtual Braille keyboard. When activated through VoiceOver, users can type Braille characters by tapping the screen with multiple fingers simultaneously, mimicking the six-key layout of a…
Core Haptics
Apple's iOS framework for designing and playing custom vibrotactile patterns on iPhone using the Taptic Engine. Core Haptics lets developers synthesize transient 'taps' and continuous vibrations, vary intensity and sharpness over time, and synchronize haptics with audio using…
Dynamic Type(also: Dynamic Text Size, Text Scaling, Font Scaling)
An iOS accessibility feature that allows users to adjust the system-wide text size to meet their reading needs, from very small to very large. Apps that support Dynamic Type automatically reflow and resize their text content when the user changes their preferred text size in…
Screen Recognition
A computer vision feature in Apple's VoiceOver screen reader that automatically interprets the pixels of a graphical user interface to identify and label interactive elements when applications have not properly implemented accessibility APIs. Screen Recognition analyses the…

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