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iPhone Night Shift feature Doesn’t Improve Sleep

iPhone Night Shift feature Doesn't Improve Sleep

iPhone Night Shift feature Doesn’t Improve Sleep

The iPhone’s Night Shift feature doesn’t actually improve sleep,

according to a new BYU study.

Night Shift uses the clock and geolocation of your device to determine

when it’s sunset in your location. Then it automatically shifts the

colors of your display to warmer colors. In the morning, it returns the

display to its regular settings. Since blue light from phones is believed

to disrupt melatonin secretion and sleep cycles, the feature is said

to offer users a better night rest.
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from the Cincinnati Children’s Hospital Medical Center compared

the sleep outcomes of individuals in three categories:

those who used their phone at night with the Night Shift function

turned on, those who used their phone at night without Night Shift

and those who did not use a smartphone before bed at all.

“In the whole sample, there were no differences across the three groups,”

Jensen said. “Night Shift is not superior to using your phone without

Night Shift or even using no phone at all.”

The study included 167 emerging adults ages 18 to 24 who use cell

phones daily. They were asked to spend at least eight hours in bed and wore

an accelerometer on their wrist to record their sleep activity. Individuals

who were assigned to use their smartphone also had an app installed

to monitor their phone use.

The measured sleep outcomes included total sleep duration, sleep quality,

wake after sleep onset and the time it took to fall asleep.

You can read the full study in Science Direct.

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