Windows 10 now has a wonderful feature built in called Night Light. Turning this on changes the white levels of your computer from a Cool Blue White to a Warm White as well as reducing the brightness.
To turn this on Open Settings -> System -> Display
Here you will see a Night Light option.
Click Night light settings and you can configure how warm or cool the white will be and even set it to a schedule to turn on automatically.
For those still on Windows 7 you can download a wonderful program named F.lux https://justgetflux.com/
This provides the same function that the Windows 10 Night Light offers.
On your cellphone and find your screen blinding
Starting in Android N a “Night Mode” is provided. Open Settings, Select Display, Select Nightlight and you can configure the times it will activate.
On a Apple device? iOS 9.3 added a “Night Shift” mode that also does the same. Apple devices use the clock and GPS to determine when the sun sets and rises by default.
Turn on Night Shift
There are two ways to turn Night Shift on and off:
Open Control Center. Firmly press the Brightness control icon, then tap this icon below:
to turn Night Shift on or off.
· Go to Settings > Display & Brightness > Night Shift.2 On the same screen, you can schedule a time for Night Shift to turn on automatically and adjust color temperature.
By default, Night Shift turns on from sunset to sunrise.