f.lux icon
f.lux icon

f.lux

 962 likes

Software that makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

Main Window

License model

  • FreeProprietary

Country of Origin

  • US flagUnited States

Platforms

  • Mac  OSX PPC need v1.1
  • Windows
  • Linux
4.2 / 5 Avg rating (35)
962likes
39comments

Features

Suggest and vote on features

Properties

  1.  Lightweight

Features

  1.  Blue light filter
  2.  Color temperature modes
  3.  Time Scheduling
  4.  Colour control
  5.  Color Temperature
  6.  Simple installation
  7.  No registration required
  8.  Ad-free
  9.  Backlight brightness control
  10.  Reduce Eyestrain
  11.  Dark Mode
  12.  Display Management
  13.  Temperature Monitoring
  14.  Scheduling

 Tags

f.lux News & Activities

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Recent activities

  • JCarver, thesuncitywitch and sweetemberxv liked f.lux
    about 1 month ago
  • App icon
    POX added f.lux as alternative to BlinkMore
    3 months ago
  • RudolphX rated f.lux  
    4 months ago
  • RudolphX liked f.lux
    4 months ago
  • App icon
    justarandom added f.lux as alternative to LumiGuard
    4 months ago
  • cloudinger rated f.lux  
    4 months ago
  • cloudinger and VyomStark liked f.lux
    4 months ago
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f.lux information

  • Developed by

    US flagf.lux Software LLC
  • Licensing

    Proprietary and Free product.
  • Rating

    Average rating of 4.2 (35 ratings)
  • Alternatives

    57 alternatives listed
  • Supported Languages

    • English

Our users have written 39 comments and reviews about f.lux, and it has gotten 962 likes

f.lux was added to AlternativeTo by nironan12 on Jun 18, 2010 and this page was last updated Jul 7, 2024. f.lux is sometimes referred to as Flux.

Comments and Reviews

   
 Post comment/review
Comment summary: f.lux is widely praised for improving sleep and easing eye strain by adjusting screen color temperatures automatically. However, users have reported issues such as screen performance problems, system compatibility issues, and eye discomfort. Additionally, the developer's prompt response to technical problems is appreciated, although some feel the licensing is restrictive. There are concerns over compatibility with certain devices and the stalled development for Linux. Despite critique, many find it an essential tool.
Top Positive Comment
cryoff
Nov 30, 2017
1

Just an amazing tool for your eyes' health

Top Negative Comment
John_Proctor
Apr 9, 2017
3

This app completely resets Windows calibration settings and the developers aren't willing to fix it even though the issue has been oepnly addressed on their forum multiple times. This makes it completely unusable for me since all my black colors turn to grey and if you're using Windows calibration, you won't be able to use it neither.

NejyCR
Oct 31, 2024
0

A customizable time-based blue light filter. The only feature I wish it had was a schedule based on the day of the week, as on weekends I stay up late and don't want the filter to activate.

nnlha2s5
May 12, 2024
0

broken on linux for several years

Mr. Anon
May 22, 2023
0

A wonderful program and will always be my favorite screen dimmer.

Yuriy Koshulap
Feb 19, 2021
0

Windows 10 Night Light feature did not provide sufficiently warm color temperature. f.lux also surprised with a non intrusive reminder about my wake-up time.

kfua
Oct 23, 2020
0

It works great! It changes the colors of the screen during the day.

Show more comments
7 of 39 comments

What is f.lux?

Ever notice how people texting at night have that eerie blue glow?

Or wake up ready to write down the Next Great Idea, and get blinded by your computer screen?

During the day, computer screens look good—they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at the sun.

f.lux fixes this: it makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

It's even possible that you're staying up too late because of your computer. You could use f.lux because it makes you sleep better, or you could just use it just because it makes your computer look better.

f.lux makes your computer screen look like the room you're in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.

Tell f.lux what kind of lighting you have, and where you live. Then forget about it. f.lux will do the rest, automatically.

f.lux also supports Philips Hue smart lighting system. Lightbulbs can be synced to your f.lux settings to create a surrounding environment that's more friendly to sleep.

Official Links