How to Use Night Shift Mode in iOS 9.3

Discussion in 'iOS Blog Discussion' started by MacRumors, Jan 14, 2016.

  1. MacRumors macrumors bot


    Apr 12, 2001

    Night Shift, a major new feature iOS 9.3, is a display-based setting that lets you "warm up" an iPhone or iPad's screen at night to cut down on blue light exposure. Similar to f.lux on the Mac, Night Shift will automatically change the color temperature of an iOS device's display to reflect the time of day.

    With Night Shift, an iPhone or iPad screen will look bright white with a blue-based lighting scheme during the day, but as the sun sets, that bright white will fade into a warm yellow that's easier on your eyes and your circadian rhythm.


    What's the Deal With Blue Light?

    Blue light, which is the light on the spectrum that makes our computer, tablet, and phone screens look so crisp and bright, is great during the day because it mimics a bright morning. Blue wavelengths wake us up, boost our attention, and let us know it's time to start the day.

    At night, blue light is less desirable because that's the time when our bodies should be getting ready to wind down for sleep. Studies have shown that looking at a bright blue screen during the evening hours can confuse the body's biological clock and disrupt our natural circadian rhythm (the ~24-hour light and dark schedule everyone runs on) by suppressing melatonin production, making it harder to fall asleep. All light disrupts the circadian rhythm, but blue light has been proven to be the most disruptive.

    On the Kelvin scale used to determine color temperature, an iPhone 6 display measures in at about 7100K, while an iPad Air 2 display is slightly warmer at 6900K. On the lighting spectrum, 6900K and 7100K blue light levels are similar to the light you would see on a bright, cloudy day outdoors. Blue light is also harder on the eyes, especially in an indoor room that's lit with a dimmer yellow light.


    In a nutshell, your iPhone and iPad might be keeping you up at night, and Apple's solution to that problem is Night Shift.

    Activating Night Shift

    Night Shift mode works by shifting the iPhone or iPad's display from a blue tint to a much more yellow tint, either on demand, automatically at sunrise and sunset, or on a custom user-set schedule. Night Shift is turned on in the Settings app.

    Click here to

    Article Link: How to Use Night Shift Mode in iOS 9.3
  2. RadioGaGa1984 macrumors 6502a


    May 23, 2015
    Glad I don't have to worry about this kinda thing. At Bedtime I have two choices to make. Do I fall asleep before or after my head hits the pillow. And I use my iPad iPhone or MacBook all the way up till Bedtime.
  3. Gudi, Jan 14, 2016
    Last edited: Jan 14, 2016
  4. Take Flight macrumors member

    May 18, 2011
    Really wish Apple would allow more scheduling/automation of other settings besides just a couple things of their choosing (do not disturb, now this night shift setting).

    A simple time/location based scheduling of the phone's volume settings would be infinitely more useful than this.
  5. oneMadRssn macrumors 68030


    Sep 8, 2011
    Boston, MA
    Does Night Shift transition slowly and smoothly at the scheduled time, like f.lux does where it is barely noticeable, or it a quick and jarring transition?
  6. Davmeister macrumors 6502


    May 7, 2009
    Does it turn off when using camera/photos app? You'd hope they'd have thought of that...
  7. freepomme macrumors 6502a

    Oct 30, 2015
    Boston, MA
    iPhones BLAST bright light in your eyes at night, and especially with the newer white phones. Somebody decided that it would be cool to have the startup screens match what color your phone is.

    If you have a white iPhone... [​IMG]

    Doesn't make sense though because it barely matches the white that the iPhone actually is.


    I don't get why it's necessary.

    Attached Files:

  8. Alrescha, Jan 14, 2016
    Last edited: Jan 14, 2016

    Alrescha macrumors 68000


    Jan 1, 2008
    If you think iPhones "BLAST" any amount of light at all, you have never stood outside of a house at night when someone was watching an old CRT television set with its ~500 watts of actinic blue glare. :)

  9. VSMacOne macrumors 601


    Oct 18, 2008
    @MacRumors @WildCowboy the article incorrectly states "At its coolest, the display is at its default setting. This is the way an iPhone or iPad looks without Night Shift mode". That's not true. If the toggle for Blue Light Reduction is ON, even the lowest level on the COOLER setting has less blue that the default setting of the screen, with the toggle OFF. You can easily check this yourselves.
  10. macs4nw macrumors 68040


    Give us this option in OS X too. I spent too many nights at my desktop wondering why I'm wide awake..... :D
  11. gaximus macrumors 6502a

    Oct 11, 2011
    The point being, its better to stop seeing blue light a few hours before you go to bed.
  12. BlueCreek macrumors member

    Aug 28, 2014
    Why not download f.lux? It has way more options than this night shift.
  13. jclo Editor


    Staff Member

    Dec 7, 2012
    Thank you. I double checked this and you're right. On its lowest setting, it's still more yellow than with Night Shift toggled off. Will fix. Appreciate the help :)
  14. bushido Suspended


    Mar 26, 2008
    took me a while to realize that i have to enable automatic time in the privacy settings for it to give me the 3rd (sunset) option
  15. T Coma macrumors member

    T Coma

    Dec 3, 2015
    People's Republic of Chicago
    New feature? Maybe for phones... iMac screens were shifting to yellow years ago. o_O
  16. RadioGaGa1984 macrumors 6502a


    May 23, 2015
    Says who? Doesn't effect my sleep.
  17. caverman macrumors newbie

    Jan 14, 2016
    Unfortunately doesn't seem to automatically turn off for photos, everything looks very orangy
  18. mw360 macrumors 65816


    Aug 15, 2010
    Dont worry, if f.lux can do it, then they thought of it.

    I don't think it would be a serious omission anyway. Theres no guarantee that every time a user opens Photos than they need the finest colour precision, especially if their eyes have become accustomed to warm interior lighting and the warmer screen. The switch is right there for the times they do.
  19. Mizouse macrumors member

    Nov 5, 2014
    This is great... Until you realize your entire house is filled with daylight balanced LED light bulbs :confused:
  20. mconk macrumors 6502


    Mar 10, 2009
    This article fails to mention that if you do not have 'Setting Time Zone' enabled meet location services, this feature will not work automatically and you'll have to set a schedule of you don't want to keep location services on.
  21. subjonas macrumors 6502

    Feb 10, 2014
    It would be cool if there was a night shift toggle button in control center. I'd love to replace the 'do not disturb' button personally.
  22. 844090 Suspended

    Sep 12, 2013
    The transition takes exactly a minute.
  23. ArneK macrumors newbie

    Aug 19, 2015
    since this is still a beta everyone should report this to apple so they will fix this. I just did at least
  24. gaximus macrumors 6502a

    Oct 11, 2011
  25. Alrescha macrumors 68000


    Jan 1, 2008
    If they consider it a bug... To people whose eyes have adapted to the color shift, unshifted pictures are going to be a nasty surprise.


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