The best alternative to f.lux is Redshift, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to f.lux and 16 are so hopefully you can find a suitable replacement. Other interesting alternatives to f.lux are Red Moon, Iris mini, Redshift Tray and Iris.
Redshift adjusts the color temperature according to the position of the sun. A different color temperature is set during night and daytime.
It doesnt't work sometimes...
It's just not as good as f.lux is.
The app is free on F-Droid and on GitHub but you can buy it on the Google Play Store to support the developer.
Straightforward. Fast. No ads. No trackers.
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.
Very minimalistic and lightweight. Doesn't affect games (i.e. microstuttering) the way f.lux does (if you set it to Paused mode).
Redshift Tray is a no-frills GUI for the screen temperature adjustment tool Redshift.
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.
Iris has all the functionality of f.lux and much more
Intuitive to use and easy to install
Free software for eye protection and more! It protects your eyes while you are working on the computer. Eye Saver has three main functions: blue light filter; eliminates the invisible flickering of the display backlight; reminds you to take breaks;
Eye Saver eliminates flickering too not only filters the blue light as Flux does plus breaks timers and screen color effects. Great software.
Twilight Blue Light Filter is an optimal night filter that can be created to provide a warm light night screen for your eye care.
Do you use your mobile phone after sunset? Do you use your phone within three hours of your bed time? If yes, then your device might be taking your sleep away. Bluelight from your mobile screens sends a signal to brain to wake up, and makes it difficult for us to sleep at night.
To schedule Night Light so it turns on automatically, select Start > Settings > System > Display > Night light > Night light settings.
Worlds first Myopic Defocus effect. Applies a Myopic Defocus effect on any website. This makes the screen look on the retina naturally as if it was at a greater distance. People report it being more convenient to look at.
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This is open source, while f.lux wants you to download a binary and run it constantly on your system.