Top Alternatives to f.lux

Redshift automatically adjusts the color temperature of your screen based on the position of the sun. It aims to reduce eye strain and improve sleep by filtering out blue light during evening hours, making the display warmer and more comfortable to view in ambient light.

Twilight is an Android application designed to mitigate the potential negative effects of blue light emitted from device screens, particularly during evening hours. By applying a customizable red filter, it helps reduce eye strain and promotes better sleep patterns by aligning screen color temperature with natural light cycles.

Iris is a comprehensive software designed to protect your eyes, improve sleep quality, and boost productivity by intelligently managing screen light and offering health features.

Red Moon is an open-source Android screen filter application designed to reduce eye strain and improve sleep quality by adjusting the screen's color temperature and brightness, primarily by filtering out blue light during nighttime use.

Dimmer is a free, portable Windows utility designed to provide advanced control over display brightness. It allows users to dim their screens beyond the limits of standard hardware controls, offering features like color temperature adjustment and scheduling for enhanced eye comfort and usability, particularly in low-light environments.

Nocturne is a discontinued macOS application designed to modify display colors for improved viewing in low-light environments.