Night Shift (software)
{{Short description|iOS and macOS software feature}}
Night Shift is a built in software feature of iOS and macOS. It was introduced in 2016–2017 into iOS in iOS 9.3 and into macOS in macOS Sierra 10.12.4.{{Cite news|url=https://www.imore.com/how-use-night-shift-your-mac|title=How to use Night Shift on your Mac|first=Joseph|last=Keller|date=April 18, 2018|website=iMore|access-date=2018-06-18}} The feature changes the color temperature of the display towards the warmer part of the color spectrum{{Cite web|url=https://www.imore.com/night-shift|title=How to use Night Shift on your iPhone or iPad|first=Rene|last=Ritchie|author-link=Rene Ritchie|date=March 5, 2018|website=iMore|access-date=2023-03-20}} that reduces some of the blue light from the screen.{{Cite web|url=https://www.theverge.com/2016/3/29/11326194/apple-night-shift-blue-light-sleep|title=Can Apple's color-shifting screen really help you fall asleep faster?|date=2016-03-29|website=The Verge|access-date=2017-04-29}} Apple claims that the feature may help users have a better night's sleep by filtering blue wavelengths from the display, which suppress melatonin biosynthesis.{{Cite news|url=http://www.macworld.com/article/3047121/iphone-ipad/ios-93-the-new-night-shift-feature-probably-wont-help-you-sleep-better.html|title=iOS 9.3: The new Night Shift feature probably won't help you sleep better|work=Macworld|access-date=2017-04-29}} The feature is similar to the functionality f.lux provides.{{Cite web|url=http://mashable.com/2016/01/14/f-lux-apple-night-shift/|title=F.lux creators ask Apple to open Night Shift features to developers|last=Bell|first=Karissa|website=Mashable|date=15 January 2016 |access-date=2017-04-29}}{{Cite web|url=http://mashable.com/2016/03/21/how-to-use-night-shift-in-ios-9-3/|title=How to use Apple's new Night Shift feature in iOS 9.3|last=Bell|first=Karissa|website=Mashable|date=21 March 2016 |access-date=2017-05-20}}
Effectiveness
Changing the color temperature of the display from blue towards yellow (without dimming the screen) was shown to have no effect on sleep outcomes (sleep latency, duration, efficiency and wake after sleep onset) in a 2021 study on 167 college undergraduates{{cite journal |last1=Duraccio |first1=Kara M. |last2=Zaugg |first2=Kelsey K. |last3=Blackburn |first3=Robyn C. |last4=Jensen |first4=Chad D. |title=Does iPhone night shift mitigate negative effects of smartphone use on sleep outcomes in emerging adults? |journal=Sleep Health |date=August 2021 |volume=7 |issue=4 |pages=478–484 |doi=10.1016/j.sleh.2021.03.005 |pmid=33867308 |s2cid=233299395 |url=https://news.byu.edu/intellect/is-night-shift-really-helping-you-sleep-better|url-access=subscription }} and to be insufficient for preventing the impact on melatonin suppression.{{cite press release |url=https://www.lrc.rpi.edu/resources/newsroom/pr_story.asp?id=383 |title=New LRC Study Evaluates the Effectiveness of Apple's iPad Night Shift Application |date=2018-02-05 |access-date=2021-09-16 |archive-date=2022-01-15 |archive-url=https://web.archive.org/web/20220115220031/https://www.lrc.rpi.edu/resources/newsroom/pr_story.asp?id=383 |url-status=dead}}{{cite journal |last1=Nagare |first1=R |last2=Plitnick |first2=B |last3=Figueiro |first3=Mg |date=May 2019 |title=Does the iPad Night Shift mode reduce melatonin suppression? |journal=Lighting Research & Technology |volume=51 |issue=3 |pages=373–383 |doi=10.1177/1477153517748189 |pmc=6561503 |pmid=31191118}} In mice, yellow colors disrupted the mouse body clock more than equally bright blue colors.{{cite journal |last1=Mouland |first1=Joshua W. |last2=Martial |first2=Franck |last3=Watson |first3=Alex |last4=Lucas |first4=Robert J. |last5=Brown |first5=Timothy M. |title=Cones Support Alignment to an Inconsistent World by Suppressing Mouse Circadian Responses to the Blue Colors Associated with Twilight |journal=Current Biology |date=December 2019 |volume=29 |issue=24 |pages=4260–4267.e4 |doi=10.1016/j.cub.2019.10.028 |pmid=31846668 |url=https://www.manchester.ac.uk/discover/news/researchers-discover-when-its-good-to-get-the-blues/|pmc=6926481 }}
Compatibility
Functionality
The feature can be turned on in Settings (in iOS){{Cite news|url=https://www.cnet.com/how-to/how-to-enable-night-shift-in-ios-9-3/|title=How to enable Night Shift in iOS 9.3|work=CNET|access-date=2017-04-29|language=en}} and in System Preferences (in macOS){{Cite news|url=https://www.macrumors.com/how-to/night-shift-macos-sierra-10-12-4/|title=How to Use Night Shift in macOS Sierra 10.12.4|access-date=2017-04-29|language=en}} and can be toggled on or off manually in the Notification Center (in macOS){{Cite web|url=http://mashable.com/2017/01/24/macos-night-shift-beta/|title=Apple's upcoming Mac update will include a long-awaited feature that will help you sleep|last=Wong|first=Raymond|website=Mashable|date=24 January 2017 |access-date=2017-04-29}} or in the Control Center (in iOS). The feature can be enabled or disabled with Siri in iOS{{Cite web|url=https://9to5mac.com/2016/03/23/how-to-set-up-use-night-shift-mode-iphone-ipad-video/|title=How-To: Set up and use Night Shift mode on iPhone and iPad [Video]|last=Benjamin|first=Jeff|date=2016-03-23|website=9to5Mac|access-date=2017-04-29}} and macOS.{{Cite web|url=https://9to5mac.com/2017/01/25/how-to-turn-on-night-shift-mac/|title=How to enable Night Shift for Mac and how it works on macOS 10.12.4 [Video]|last=Hall|first=Zac|date=2017-01-25|website=9to5Mac|access-date=2017-04-29}} The feature can set so it is enabled at sunset and turn off at sunrise (the default) or turned on and off on a custom schedule. The feature when set to enable at sunset and disable at sunrise relies on the user's approximate location to determine the time of sunset and sunrise.{{Cite news|url=https://www.macrumors.com/how-to/use-ios-9-3-night-shift-mode/|title=How to Use Night Shift Mode in iOS 9.3|access-date=2017-04-30|language=en}} The user can also customize the intensity of Night Shift in Settings (iOS) or System Preferences (macOS).{{Cite news|url=http://www.macworld.com/article/3183105/macs/how-to-adjust-macos-sierra-10124s-night-shift-settings.html|title=How to adjust macOS Sierra 10.12.4's Night Shift settings|work=Macworld|access-date=2017-04-29|language=en}}
See also
- Electronic media and sleep
- f.lux
- Redshift (software)
- Night Light, a feature of the Creator's Update of Windows 10
- Light-on-dark color scheme