If you’re a night owl, then you’ll definitely appreciate this trick. The blinding white lights from our phone screens are enough to burn our retinas in the middle of the night, and even the minimum brightness level just isn’t dark enough. So, if you want to save your eyeballs while also browsing long into the night, you’ll want to activate Ultra-Dark Mode.
Go to Settings, tap on General, then Accessibility, and find Zoom. Scroll down until you find the Show Controller setting. Tape the Home button three times then tap the circular controller. Slide the bar until you’re satisfied with the brightness (dimness) level. Go to Choose Filter, select Low Light, and voila!