Adjusts your computer's display to adapt to the time of day

#1 Product of the MonthJanuary 2014
Featured Embed

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

  • Pav Sidhu
    Pav SidhuDeveloper at Revisify

    I'm not wide awake before I go to sleep.


    It's not possible to do design work with a blue light filter

    Honestly, if I was to buy a new computer, this is the first thing I would download.

    Although Apple and Google have integrated blue light filters into their operating systems, they still haven't matched the capabilities that f.lux offers. f.lux gives you more control over the filter strength and once setup, you don't need to touch.

  • asif i
    asif iIT Engineer

    Easy to set up


    Works well with external displays on Macs, but not on Linux

    I have been using this since it first showed up on Product Hunt. It's probably my most used 'app' even though I barely ever interact with it. Once I found my optimal settings, I don't think I've opened the app itself more than a handful of times. It works as advertised most of the time. The only time I've had issues is when using it on external displays with Linux. Since it's my secondary device, it's not been much of a problem though.

You need to become a Contributor to join the discussion.
Ryan Hoover
Ryan HooverPro@rrhoover · Founder, Product Hunt
Flux is one of my favorite finds on Product Hunt so far. I love the moment my screen dims at ~5:30pm. So relaxing.
Jordan Metzner
Jordan MetznerHunter@mrjmetz · CEO, Washio
@rrhoover game changer
Antonella Nardi
Antonella Nardi@antonella_nardi · Co-Founder, Yourlixir
@rrhoover No brainer! Best "thing" ever.
Daniel Georgiev
Daniel Georgiev@daniel_georgiev · C++ Programmer. Founder of Iris
@rrhoover May I also suggest you also Iris :) https://www.producthunt.com/post... I also included 1000 free activation codes in the comments. Some things you may like is the ability to lower the brightness also automatically based on the time of the day. And customizing day start and end times via the clock. You can also customize the transition duration for the effect. I really like the easy to use interface of ProductHunt. Great work :)
Ryan Hoover
Ryan HooverPro@rrhoover · Founder, Product Hunt
Jordi Mon Companys
Jordi Mon Companys@mordodemaru · PM | Product Hunt Madrid
@rrhoover 5:30? What time do you go to bed?
Seth Porges
Seth Porges@sethporges · CEO, Cloth for iOS
It helps to understand the science. Blue lights suppress melatonin, which keeps you from going to sleep when you want to. This is why staring at screens before bed = no good. F.lux works by filtering out blue light. You get a red hue to your screen which takes getting used to, but it seriously makes it easier to go to bed if you're using your computer late at night. There's a similar Android app as well, that I highly recommend. Game changer.
Daniel Georgiev
Daniel Georgiev@daniel_georgiev · C++ Programmer. Founder of Iris
@sethporges Yes, I would also add that blue light is the highest-energy visible light and in the long run may cause age-related macular degeneration.
Dan Gray
Dan Gray@dan_e_gray · Minimum Viable Person
Just remember to disable it if you're doing design work with color. 😅
Murry Ivanoff
Murry Ivanoff@murryivanoff · CEO, Metrilo
I've been using f.lux for so long, it's hard for me to imagine life without it.
Anand Rajaram
Anand Rajaram@anandrajaram · Product, LogMeIn
After using this for sometime, I can barely look at other screens now. Must-have for night-owls