Accessibility Shortcut lets you quickly turn accessibility features on and off by triple-clicking the Home button.
Set up Accessibility Shortcut. Go to Settings > General > Accessibility > Accessibility Shortcut, then select the features you use the most:
VoiceOver
Invert Colors
Color Filters
Reduce White Point
Zoom
Switch Control
AssistiveTouch
Magnifier (available after you set up Magnifier)
Touch Accommodations (available after you set up Touch Accommodations)
Guided Access (available after you set up Guided Access)
Hearing Devices (available after you pair Made for iPhone hearing aids)
Use Accessibility Shortcut. Triple-click the Home button.
Slow down the double-click or triple-click speed for the Home button. Go to Settings > General > Accessibility > Home Button.