Software:Night Shift

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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.[1] The feature changes the color temperature of the display towards the warmer part of the color spectrum[2] that reduces some of the blue light from the screen.[3] 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.[4] The feature is similar to the functionality f.lux provides.[5][6]

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[7] and to be insufficient for preventing the impact on melatonin suppression.[8][9] In mice, yellow colors disrupted the mouse body clock more than equally bright blue colors.[10]

Compatibility

The Night Shift feature is compatible with all 64-bit iOS devices running on iOS 9.3 and above[11] and Macs from 2012 and later running on macOS Sierra 10.12.4 and above.[12]

Functionality

The feature can be turned on in Settings (in iOS)[13] and in System Preferences (in macOS)[12] and can be toggled on or off manually in the Notification Center (in macOS)[14] or in the Control Center (in iOS).[2] The feature can be enabled or disabled with Siri in iOS[11] and macOS.[15] 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.[2] 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.[16] The user can also customize the intensity of Night Shift in Settings (iOS)[2] or System Preferences (macOS).[17]

See also

References

  1. ↑ Keller, Joseph (April 18, 2018). "How to use Night Shift on your Mac". https://www.imore.com/how-use-night-shift-your-mac. 
  2. ↑ 2.0 2.1 2.2 2.3 Ritchie, Rene (March 5, 2018). "How to use Night Shift on your iPhone or iPad". https://www.imore.com/night-shift. 
  3. ↑ "Can Apple's color-shifting screen really help you fall asleep faster?". 2016-03-29. https://www.theverge.com/2016/3/29/11326194/apple-night-shift-blue-light-sleep. 
  4. ↑ "iOS 9.3: The new Night Shift feature probably won't help you sleep better". Macworld. http://www.macworld.com/article/3047121/iphone-ipad/ios-93-the-new-night-shift-feature-probably-wont-help-you-sleep-better.html. 
  5. ↑ Bell, Karissa (15 January 2016). "F.lux creators ask Apple to open Night Shift features to developers". http://mashable.com/2016/01/14/f-lux-apple-night-shift/. 
  6. ↑ Bell, Karissa (21 March 2016). "How to use Apple's new Night Shift feature in iOS 9.3". http://mashable.com/2016/03/21/how-to-use-night-shift-in-ios-9-3/. 
  7. ↑ Duraccio, Kara M.; Zaugg, Kelsey K.; Blackburn, Robyn C.; Jensen, Chad D. (August 2021). "Does iPhone night shift mitigate negative effects of smartphone use on sleep outcomes in emerging adults?". Sleep Health 7 (4): 478–484. doi:10.1016/j.sleh.2021.03.005. PMID 33867308. https://news.byu.edu/intellect/is-night-shift-really-helping-you-sleep-better. 
  8. ↑ "New LRC Study Evaluates the Effectiveness of Apple's iPad Night Shift Application" (Press release). 2018-02-05. Archived from the original on 2022-01-15. Retrieved 2021-09-16.
  9. ↑ Nagare, R; Plitnick, B; Figueiro, Mg (May 2019). "Does the iPad Night Shift mode reduce melatonin suppression?". Lighting Research & Technology 51 (3): 373–383. doi:10.1177/1477153517748189. PMID 31191118. 
  10. ↑ Mouland, Joshua W.; Martial, Franck; Watson, Alex; Lucas, Robert J.; Brown, Timothy M. (December 2019). "Cones Support Alignment to an Inconsistent World by Suppressing Mouse Circadian Responses to the Blue Colors Associated with Twilight". Current Biology 29 (24): 4260–4267.e4. doi:10.1016/j.cub.2019.10.028. PMID 31846668. PMC 6926481. https://www.manchester.ac.uk/discover/news/researchers-discover-when-its-good-to-get-the-blues/. 
  11. ↑ 11.0 11.1 Benjamin, Jeff (2016-03-23). "How-To: Set up and use Night Shift mode on iPhone and iPad [Video"]. https://9to5mac.com/2016/03/23/how-to-set-up-use-night-shift-mode-iphone-ipad-video/. 
  12. ↑ 12.0 12.1 "How to Use Night Shift in macOS Sierra 10.12.4" (in en). https://www.macrumors.com/how-to/night-shift-macos-sierra-10-12-4/. 
  13. ↑ "How to enable Night Shift in iOS 9.3" (in en). CNET. https://www.cnet.com/how-to/how-to-enable-night-shift-in-ios-9-3/. 
  14. ↑ Wong, Raymond (24 January 2017). "Apple's upcoming Mac update will include a long-awaited feature that will help you sleep". http://mashable.com/2017/01/24/macos-night-shift-beta/. 
  15. ↑ Hall, Zac (2017-01-25). "How to enable Night Shift for Mac and how it works on macOS 10.12.4 [Video"]. https://9to5mac.com/2017/01/25/how-to-turn-on-night-shift-mac/. 
  16. ↑ "How to Use Night Shift Mode in iOS 9.3" (in en). https://www.macrumors.com/how-to/use-ios-9-3-night-shift-mode/. 
  17. ↑ "How to adjust macOS Sierra 10.12.4's Night Shift settings" (in en). Macworld. http://www.macworld.com/article/3183105/macs/how-to-adjust-macos-sierra-10124s-night-shift-settings.html. 




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