Picture it: wake you up in the middle of the night and check your phone. Maybe you want to check the time (your phone is your alarm clock, after all) or see if that person ever replied to your message. You double-tap or lift to wake it and the screen lights up. You flinch at the bright light, squeezing your eyes shut. It takes a few moments to adjust, even if your screen's brightness is as low as possible.
Luckily, there's an easy way to avoid this. By using a plain black wallpaper for only your lock screen, you can save your eyes from this irritating scenario, and you'll still get to keep your regular wallpaper on your home screen.
Using a plain black wallpaper for only your lock screen … you'll still get to keep your regular wallpaper on your home screen.
Save this all-black image to your device and follow the instructions below to set your new lock screen-only wallpaper. Note that some of the wording may differ slightly between models and devices, but the steps should be similar nevertheless.
Navigate to the black image in your Photos app and open the share sheet.
Choose "Use as Wallpaper" to view a preview, then tap "Set."
Select "Set Lock Screen" from the given options to set the image as your lock screen's wallpaper.
Tap and hold on a blank portion of your home screen, then select Wallpapers.
Choose your gallery app
Select "Lock Screen" and confirm "Set as wallpaper" to set your lock screen to the full-black image.
Now you can enjoy your phone at night, without worrying about the intensely bright light or your lock screen!