F.lux

F.lux is a free software application that adjusts a computer display's color temperature according to the time of day. It aims to reduce eye strain and improve sleep patterns by making the screen's colors warmer at night and brighter during the day, mimicking natural light.

This tool is designed for anyone who uses a computer, tablet, or smartphone, particularly those who spend extended periods in front of screens, especially in the evening. It helps to mitigate the effects of blue light exposure on circadian rhythms.