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Extra-low brightness on iOS devices

Here's a useful trick for iOS to dim the brightness further than control center allows.

It's a pretty hidden feature and I'm not sure what Apple's intention for this setting was, but either way, it's quite useful for reading at night.

Unfortunately, it seems this won't help preserve battery life (it's a software filter and not a physical dimming of the backlight).

To enable:

  1. Go to Settings -> General -> Accessibility -> Zoom.
  2. Enable Zoom.
  3. Triple tap the screen with three fingers to bring up the Zoom configuration menu.
  4. Set the Zoom Region to "Full Screen Zoom".
  5. Set the Filter to "Low Light".
  6. Exit the menu and disable Zoom.
  7. Go to Settings -> General
  8. Scroll all the way down and set your Accessibility Shortcut to "Zoom".

Done! Now, when you triple click your home button, it should activate the Low Light filter.