Flux

Flux (officially f.lux) is a screen color temperature controller that automatically adjusts your Mac's display color throughout the day to reduce eye strain and promote better sleep. The app gradually warms your screen's color temperature in the evening, mimicking natural light cycles, and cools it back down in the morning. It's particularly popular among night workers, developers, and anyone spending long hours in front of a screen, as it helps reduce blue light exposure that can disrupt sleep patterns. The app runs quietly in the background with minimal system impact and offers flexible scheduling and customization options.