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Night Shift (software)
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<p>Night Shift is a built in software feature of <a href="/facts/IOS/mK5cggH5">iOS</a> and <a href="/facts/MacOS/Y93vVpTm">macOS</a>. It was introduced in 2016–2017 into <a href="/facts/IOS/mK5cggH5">iOS</a> in <a href="/facts/IOS_9/jeF0FGnB">iOS 9.3</a> and into <a href="/facts/MacOS/Y93vVpTm">macOS</a> in <a href="/facts/MacOS_Sierra/jV5ocHbo">macOS Sierra 10.12.4</a>. The feature changes the <a href="/facts/Color_temperature/g77MjsPM">color temperature</a> of the display towards the warmer part of the <a href="/facts/Color_spectrum/frPBh8o5">color spectrum</a> that reduces some of the blue light from the screen. <a href="/facts/Apple_Inc./oTJYta3k">Apple</a> claims that the feature may help users have a better night's sleep by filtering blue wavelengths from the display, which suppress <a href="/facts/Melatonin/LEyEWg18">melatonin biosynthesis</a>. The feature is similar to the functionality <a href="/facts/F.lux/aemGKTEa">f.lux</a> provides. </p>