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 18 are so hopefully you can find a suitable replacement. Other interesting alternatives to f.lux are LightBulb, Twilight, Solace 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
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.
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.
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.
Iris has all the functionality of f.lux and much more
Intuitive to use and easy to install
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.
It makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.
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.
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.
World's first instantaneous content-aware brightness control app that let your screen’s brightness and color temperature adapt instantly and automatically to provide the most optimal viewing experience for your eyes.
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This is open source, while f.lux wants you to download a binary and run it constantly on your system.