Settings isn’t the only place where you can look for Night Shift. This way, I can set my screen to turn warmer at 12:30 AM and stay like that until 10 AM. Clearly, the geolocation-based schedule wouldn’t work for us (I don’t want my screen to turn yellow when bright lights are all around me), but thankfully Apple has included a custom scheduling option to enable and disable Night Shift at specific times. She falls asleep shortly after, while I stay up for another couple of hours to squeeze in more work or reading. My girlfriend and I usually eat dinner at 9 PM and the lights are on until 1 AM, when we go to our bedroom and switch to a darker, relaxing purple light from one of our Hue bulbs. If you’re like me and stay up late at night, though, the ‘Sunset to Sunrise’ schedule won’t be the best option. You’ll go to bed with less strain on your eyes when you wake up the morning, Night Shift will be already off. iOS will take care of understanding when sunset is approaching and Night Shift will do the rest. ![]() If you have the kind of lifestyle in which you’re back home in the afternoon and go to bed early in the evening, this is the option you’ll want to enable. Like f.lux for Mac, Night Shift can use geolocation to understand your position on Earth, calculate sunrise and sunset times for your location, and switch the screen to warm colors from sunset to sunrise. More interesting, however, is the ability to tell iOS to automatically activate Night Shift at certain times. You’ll see how Night Shift is easier on the eyes thanks to its warm hue. As a first test, try to enable Night Shift when in bed at night (possibly with the lights off), use it for a few minutes, then switch back to normal display mode. In both cases, you’ll immediately notice when Night Shift is turned on: your iOS device’s screen will switch to a warmer tone, keeping colors of the interface the same but with a distinct yellow layer on top of everything. It can be activated in two ways: manually (with a toggle) or with a schedule. Night Shift lives in Settings > Display & Brightness > Night Shift. With iOS 9.3, Apple has taken a page from f.lux and built Night Shift so that its behavior can be automatic, with some basic manual controls. The darker it gets in the evening, the more f.lux reduces blue light, tinting the screen yellow and, later at night, light orange. The way the f.lux team fixed this problem several years ago is simple: with a menu bar app, f.lux monitors your time zone and time of the year, and, as it begins getting dark outside, the app reduces the blue light emission of a Mac’s display, veering towards a yellow hue. Blue light, studies suggest, can lead to having trouble sleeping and getting quality sleep bad sleep, in return, can lead to all sorts of complications such as heart disease, obesity, and stress. According to numerous scientific studies – excellently collected by the f.lux team on their Research page – excessive exposure to blue light during dark hours (at night) may negatively affect our circadian rhythm – the biological clock that also regulates how our bodies and brains get ready for sleep at night. Modern electronic devices (both laptops and mobile devices) produce a blue light wavelength. ![]() Night Shift follows the somewhat controversial shutdown of f.lux sideloading while we don’t know whether Night Shift was built in direct response to f.lux or if its early 2016 launch is only a coincidence, the feature is eerily similar to (but less customizable than) the popular blue light reduction tool for OS X.įirst, a quick primer on blue light and what reducing its display emission means.
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