Use two simple tricks to lower your iPhone’s screen brightness even further than what’s normally allowed using the brightness slider in iOS Control Center.
We’ve all been there before. It’s late, and it’s dark, but you still have to get a few more things done. You set your iPhone’s screen to its lowest possible brightness via Control Center, and you quickly realize that even at the lowest setting, the screen is way too bright for your eyes in such a dark environment.
What can you do in a situation like this? You could jailbreak and install a jailbreak tweak like Dim, but that’s not always an option, nor is it always desirable.
Fortunately, there is a way to quickly adjust screen brightness levels even lower than what’s possible via the Control Center’s brightness slider. By leveraging some of iOS’ built-in accessibility features, you can set your iPhone’s screen brightness levels much lower than you think.
Reduce iPhone screen brightness even beyond the minimum
1) Open the Settings app and tap Accessibility > Zoom.
2) Set Zoom Region to Full Screen Zoom and Zoom Filter to Low Light.
3) Then, turn on Zoom from the top. Your iPhone screen will zoom out. Double-tap on the screen with three fingers to return the screen to normal. In some cases, you may have to select Zoom Out first.
4) Now, open Control Center and drag the brightness slider to the minimum. You’ll notice that the display becomes even darker than what’s normally allowed. In fact, if you enable the shortcut while in a bright room, the screen becomes almost unreadable.
Yes, quite a few steps are required to get this set up, but once it is, you’re pretty much set going forward.
Tip: Leaving Zoom enabled won’t enlarge your screen until you double-tap with three fingers, but if you want an easy way to toggle Zoom on or off, go to Settings > Accessibility > Accessibility Shortcut and select Zoom. After this, you can turn on and off Zoom by triple-pressing the iPhone’s side button or iPad’s top button.
Use Reduce White Point to dim the iPhone screen
Apart from the Zoom feature, you can also enable Reduce White Point, which decreases the intensity of bright colors and makes the screen appear darker than it needs to be.
1) Open Settings and go to Accessibility > Display & Text Size.
2) Scroll down to the bottom and switch on Reduce White Point.
3) Open Control Center and drag the brightness slider to the minimum.
4) Return to the Display & Text Size settings screen and drag the Reduce White Point slider to the right (towards 100%) to lower the screen brightness even further.
On the same note: How to dim your Mac screen brightness even lower than what’s allowed by macOS