Redshift adjusts the color temperature according to the position of the sun. A different color temperature is set during night and daytime.
Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux
- BSD

f.lux is described as 'Software that makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day' and is a leading color temperature tool in the system & hardware category. There are more than 50 alternatives to f.lux for a variety of platforms, including Windows, Mac, Linux, Android and Wayland apps. The best f.lux alternative is Redshift, which is both free and Open Source. Other great apps like f.lux are LightBulb, SunsetScreen, RedshiftGUI and Twilight.
Redshift adjusts the color temperature according to the position of the sun. A different color temperature is set during night and daytime.

Background application that adjusts screen gamma, making the colors appear warmer at night, reducing strain on your eyes.


Whether you're a morning lark or night owl, SunsetScreen allows you to set the time of the sunset and sunrise, so you can have full control over your sleep cycle.



RedshiftGUI changes the color temperature of your monitor to better match that of your surrounding. This means that it sets a cooler color temperature during the daytime (due to natural lighting) and sets a warmer temperature at night (due to indoor lighting). Similar to f.



The app filters the blue spectrum on your phone or tablet after sunset and protects your eyes with a red filter. The filter intensity is smoothly adjusted to the sun cycle based on your local sunset and sunrise times.



The app is free on F-Droid and on GitHub but you can buy it on the Google Play Store to support the developer.




Automatically changes Mac appearance using real-time weather, sunlight, and time data for light and dark modes, dynamic wallpapers, and color temperature, with on-device privacy, menu bar access, no subscriptions, and no analytics for seamless daily comfort.




Enjoy free cross-platform blue light reduction and PWM flicker-free brightness control with Iris mini. Minimalistic design, portable, and automatic for no-hassle, eyestrain-relief across all devices. Simply double-click to activate, perfect for every lighting condition.



Redshift Tray is a no-frills GUI for the screen temperature adjustment tool Redshift.



Midnight Lizard web-extension for Google Chrome™ and Mozilla Firefox™ provides custom color schemes for all websites.




Reduces blue light and flicker for eye comfort, supports auto color temperature adjustment based on time, customizable modes, overlays, color and font options, docking station support, and accessible part-screen filtering for diverse needs.


CareUEyes is a very simple but useful program when it is about your eye care. The program comes with a very simple and clean interface and needs to technical knowledge. Even a novice computer user can download and use it easily.


This is open source, while f.lux wants you to download a binary and run it constantly on your system.