Gammastep is a utility that adjusts the color temperature of your display according to the time of day, your location, or a manually defined schedule.
It’s intended to make the screen warmer at night and cooler during the day, which can help reduce eye strain when you’re working in front of a monitor for long periods. The software offers flexible configuration through command-line options and an optional configuration file, making it suitable for both simple setups and more customised desktop environments.
This is free and open source software.
Key Features
- Adjusts screen color temperature automatically based on the sun’s position.
- Supports manual coordinates as well as automatic location providers.
- Lets you configure day and night temperatures, brightness, gamma, fade behaviour, and transition periods.
- Provides one-shot modes, reset options, and hook scripts for custom actions when display periods change.
- Includes an optional graphical indicator, gammastep-indicator, for desktop notification areas.
- Supports multiple adjustment methods, including RandR and Wayland wlroots-based gamma control.
Website: gitlab.com/chinstrap/gammastep
Support:
Developer: Cameron Nemo and contributors
License: GNU General Public License v3.0

Gammastep is written in C. Learn C with our recommended free books and free tutorials.
Related Software
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|---|---|
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| Stretchly | Reminder to take breaks |
| BreakTimer | Set up customizable breaks and will remind you to take them |
| Workrave | Assists in the recovery and prevention of Repetitive Strain Injury |
| Gammastep | Adjust the color temperature of your screen |
| Redshift | Adjusts the color temperature of your display |
| ZenBreak | Menu bar app that reminds you to take breaks |
| RSIBreak | Take care of your health and take regular breaks |
| sunsetr | Automatic blue-light filter |
| wlsunset | Adjusts display color temperature on Wayland compositors |
| Stretch Break | Digital wellbeing tool that helps you take regular breaks |
| Sane Break | Gentle break reminder |
| eyerest | Remind your eyes to take a screen break |
| Desktop Dimmer | Darker-than-dark dimming for internal and external screens |
Read our verdict in the software roundup.
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