

Apple doesn’t provide exact temperatures, with the slider simply labeled with “Less Warm” and “More Warm.”Īt its coolest, the display is just slightly more yellow than it is without the Night Shift feature enabled. By default, the slider is set in the middle, but moving it to the left will increase the amount of blue light while moving it to the right will decrease the amount of blue light when Night Shift is activated. While Night Shift mode is turned on, the exact color of the display can be adjusted with the slider to meet individual preferences. To use Night Shift’s schedule feature, make sure to turn on these two settings. Make sure “Setting Time Zone” is toggled on. This can be accessed by going to Privacy –> Location Services –> System Services. For the default scheduling to work, Location Services (under the “Privacy” section in the Settings app) needs to be enabled so Apple can determine the sunrise and sunset times of the area where you are located.Īdditionally, the “Setting Time Zone” feature under Location Services also needs to be enabled. With Apple’s default schedule, Night Shift will turn on when the sun sets and turn back on when the sun rises in the morning. Night Shift will look like it is turned off, but when sunset rolls around, it will turn on automatically and the toggle will be activated.

When using Night Shift with the Schedule mode, there is no need to touch the toggle. Tap on “Custom Schedule” to set your own times for Night Shift to turn on and off again.When the sun sets in your local area, the display will shift from regular mode to Night Shift mode over the course of a minute. Tap on “Sunset to Sunrise” to set Night Shift to come on when the sun sets based on your iPhone’s clock.In the Night Shift menu, tap on “From and To” to set Night Shift activation times.With no schedule set, Night Shift mode will automatically turn off in the morning.Tap on the “Manually Enable Until Tomorrow” toggle.This is where the Night Shift controls are located. Scroll to the Display & Brightness section.Night Shift is turned on in the Settings app. 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. In a nutshell, your iPhone and iPad might be keeping you up at night, and Apple’s solution to that problem is Night Shift. Blue light is also harder on the eyes, especially in an indoor room that’s lit with a dimmer yellow light. On the lighting spectrum, 6900K and 7100K blue light levels are similar to the light you would see on a bright, cloudy day outdoors. 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. All light disrupts the circadian rhythm, but blue light has been proven to be the most disruptive. 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. Blue wavelengths wake us up, boost our attention, and let us know it’s time to start the day.Īt night, blue light is less desirable because that’s the time when our bodies should be getting ready to wind down for sleep. What’s the Deal With Blue Light?īlue 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.

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. 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. 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.

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