Setting the color temp of the screen really only requires about 40 lines of C (80 or so all inclusive). sct is a crude utility which does roughly that. I’d say exactly that, but some of the calculations aren’t actually exact.
sunsetr Alternatives
sunsetr is described as 'Automatic blue-light filter for Hyprland, Niri, and everything Wayland' and is an app. There are more than 50 alternatives to sunsetr for a variety of platforms, including Windows, Linux, Mac, Android and Wayland apps. The best sunsetr alternative is f.lux, which is free. Other great apps like sunsetr are Redshift, LightBulb, Red Moon and Midnight Lizard.
Alternatives list
Night Screen is created for those people who spend a lot of time at night working.
Limit your exposure to energy-efficient lighting before bed. In addition to the LED screens in your electronics, energy-efficient lighting emits a lot of blue light.


+1
Nocturne is simple app for switching a computer to night vision mode. It has a few tricks up its sleeve: color correction, window shadow toggling, and background removal.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Mac

Shady puts a shade over your screen to help soothe your tired or dazzled eyes. You can use it to reduce your Mac's brightness far below the usual minimum, without any risk of damage to your screen.
Cost / License
- Free
- Open Source
Platforms
- Mac

Cost / License
- Freemium
- Proprietary
Platforms
- Android
SunshinePal is your daily sunlight companion designed to help you track your exposure, set healthy goals, and reconnect with nature for better sleep and mood.
Cost / License
- Freemium
- Proprietary
Platforms
- iPhone
- Apple Watch


+5
A Python program that calculates ambient brightness and sets screen's correct backlight using a camera.

Lumen - magic auto brightness based on screen contents. You control Lumen simply by using your brightness keys - it'll automatically learn your preferences.

Experience a more comfortable screen during nighttime use with LumiGuard: Night Mode. Adjust your display's color temperature and brightness to reduce eye discomfort in low-light environments.
Cost / License
- Freemium
- Proprietary
Platforms
- Android


+1
Small GTK GUI application to set contrast, brightness and gamma for wayland compositors which support the wlr-gamma-control protocol extension. Basically this is the example from here: https://github.com/swaywm/wlroots/blob/master/examples/gamma-control.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Linux
- Wayland

- 52 Away From Keyboard (AFK) alternatives
Away From Keyboard is an app that reduces eye strain with reminders to take a break.
Cost / License
- Paid
- Proprietary
Platforms
- Mac

































