The best open source alternative to f.lux is Redshift. If that doesn't suit you, our users have ranked more than 50 alternatives to f.lux and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to f.lux are LightBulb, RedshiftGUI, Red Moon and Redshift Tray.
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.
Background application that adjusts screen gamma, making the colors appear warmer at night, reducing strain on your eyes.
user-friendly interface and easily configurable
Has a customizable schedule instead of 50 meme filters no-one will ever use.
Open source, far more options, faster
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.
it is much easier to install and just works right away!
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.
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.
It makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.
Lumen - magic auto brightness based on screen contents. You control Lumen simply by using your brightness keys - it'll automatically learn your preferences.
Denmark
EU
Ukraine
China
Russia
United States
Brazil
This is open source, while f.lux wants you to download a binary and run it constantly on your system.