

The principle is that the blue light makes your brain think that it’s still daytime, thus disrupting your natural circadian rhythms which let your body know when it’s time to go to bed.

The idea behind Night Shift is to reduce the amount of blue light emanating from displays, as this particular wavelength is now thought to make it harder for people to get to sleep. Because of this, it’s available on a larger number of Apple devices, including the following Night Shift is in many ways a precursor to True Tone (arriving as it did back in iOS 9.3), albeit one that doesn’t require the additional sensors and display types.

However, if you are editing photos or need to see colors clearly, you may need to disable this feature as necessary.To enable True Tone on your iPhone or iPad go to Settings > Display & Brightness then turn on the True Tone switch. Research shows that a lower blue light on a monitor can improve your melatonin levels. Night Shift is a useful feature if you use your laptop before bed. Then you can control the tone of your screen based on personal preference. To learn more about taking MacBook Settings, sign up for our free Tip of the Day newsletter.

It acts as a blue light screen filter for MacBook which may help you sleep better. But what does Night Shift do? It is essentially a blue light filter that changes the color of your display when it’s dark outside. Night Shift is a built-in software feature on Macs.
