Best f.lux Alternatives: For Screen brightness in 2025
If you spend long hours staring at a screen, you’ve probably heard of f.lux—a handy tool that adjusts your display’s color temperature to match the time of day and reduce eye strain. But what if f.lux isn’t quite right for you or you’re looking for updated solutions? Thankfully, there are plenty of powerful f.lux alternatives in 2025, catering to every device and user preference. Whether you need better control over screen brightness, advanced scheduling, or simple one-click operation, this list will help you find the best fit for your needs.
Top 10+ f.lux Alternatives and Best for Screen Brightness in 2025
1. Iris
Iris is a powerful screen brightness and color temperature tool that offers deep customization. It’s designed for people who spend long hours behind monitors and want fine-tuned control over their viewing experience.
- Customizable color temperature and brightness
- Multiple health-focused modes (Reading, Sleep, Programming, etc.)
- Automatic adjustments based on time or manual control
- Cross-platform availability (Windows, Mac, Linux)
2. Redshift
Redshift offers open-source flexibility for those who want a lightweight solution for adjusting screen color temperature according to your surroundings. Great for developers and Linux users.
- Adjusts color temperature based on location and time of day
- Highly customizable and open-source
- Low system resource consumption
- Available for Linux, Windows, and Mac
3. Windows Night Light
Windows 10 and 11 come equipped with a built-in Night Light feature. It’s a simple way to reduce blue light automatically after sunset without extra software.
- Baked into Windows operating system
- Easy scheduling and color temperature adjustment
- No installation needed
- Minimalistic and reliable
4. LightBulb
LightBulb is a simple, open-source app designed for Windows users who want smooth transitions in screen temperature for better sleep and comfort.
- Gradual and customizable color temperature transitions
- Open-source and lightweight
- Works on multi-monitor setups
- Easy configuration with location-based scheduling
5. SunsetScreen
SunsetScreen helps you control when your screen shifts between warm and cool tones. Ideal for night owls who want to stay alert without compromising on eye comfort.
- Manual sunrise and sunset adjustment
- Custom color and brightness presets
- Blue light adjustment for evening use
- Windows exclusive
6. NightOwl
NightOwl is built exclusively for macOS, putting advanced Night Shift controls at your fingertips. Its automation makes Mac screens easier on the eyes at any time.
- Simplified Night Shift switching on Mac
- Automatic scheduling
- Supports hotkeys and menu bar controls
- Free and lightweight
7. Gammy
Gammy is an open-source app focusing on dynamic brightness adjustment. It’s perfect if you want your screen to adapt in real-time to what’s being displayed.
- Intelligent real-time brightness control based on content
- Adjusts brightness, contrast, and gamma
- Portable and open-source
- Runs on Windows and Linux
8. CareUEyes
CareUEyes combines blue light filtering with extra features like reminders and break scheduling, making it a solid f.lux alternative for health-conscious users.
- Multiple filter modes (Reading, Office, Game, etc.)
- Timer for regular eye breaks
- Detailed brightness and color adjustment
- Windows support
9. Twilight
Twilight is one of Android’s best blue light filtering apps. Your mobile device automatically dims and changes color temperature to protect your eyesight.
- Automatic color temperature adjustment based on sunset and sunrise
- Customizable filters and schedules
- Works with other apps and overlays
- Free with optional in-app purchases
10. Night Shift (iOS & macOS)
Apple’s Night Shift is built right into iPhones, iPads, and Macs. It gradually shifts the colors of your display to the warmer end of the spectrum as it gets dark—no extra app required.
- Easy to enable and schedule
- Automatic adjustment based on location and time
- No installation needed
- Seamless Apple ecosystem integration
11. RedshiftGUI
Prefer a visual interface? RedshiftGUI offers a front-end for the Redshift engine, letting you adjust color temperature without dealing with command lines.
- Easy-to-use graphical user interface
- All Redshift features with visual controls
- Simple scheduling
- Works on Windows and Linux
12. Shady (macOS)
Shady is a lightweight brightness dimmer for Mac users who want more than what their keyboard offers, without color temperature changes.
- Dims the screen beyond the system’s lowest brightness
- Non-invasive and easy to toggle
- Menu bar control for quick access
- Free to use
Conclusion
No matter your platform or preferences, there are plenty of f.lux alternatives for screen brightness and color temperature adjustment in 2025. Whether you want something minimalist like Windows Night Light, advanced options like Iris, or a mobile solution like Twilight, you can find the right fit for your eyes and workflow. Remember, taking care of your eyes is essential in a digital age—so try a few of these out and discover what works best for you.
FAQs About f.lux Alternatives and Screen Brightness
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1. Why avoid blue light at night?
Blue light can interfere with your natural sleep cycle by tricking your brain into thinking it’s still daytime. This can make falling asleep and staying asleep harder. -
2. Do f.lux alternatives consume a lot of resources?
Most options, like LightBulb and Redshift, are lightweight and won’t slow down your computer or drain your battery. -
3. Are screen brightness apps safe to use?
Yes, as long as you download from reputable sources. Most brightness adjustment tools are safe and have open