f.lux40.1

I couldn't get used to this app. The display adjust colors only irritates. Is it a matter of time?

There's been a bug in the app for years that prevents full screen video viewing without it messing up. Flux blames Apple, but whatever the reason this makes this an app that's not that useful. Apple has built in a similar functionality to the latest MacOS. Looking forward to finally having something built in so that I can uninstall flux.

I don't know how I did without this app for so long. The standard white point temperature of 6,500 Kelvin is way too blue and washed out for evening use.

The only minor complaint I have is with the "you're getting up in x hours" nag-ifications. We really need the option to disable those as I don't want a virtual mother telling me it's past my bed-time :P

It worked perfectly until this last update. Now it won't open!!

It's a good app, but it makes the screen a bit too orange with the default settings. I've had to play around with it. I also wish it would work like iOS' Night Shift (yeah, I know it's a copy), which has better color and sets to sunrise and sunset, and not the time I wake up.

I was about to download and install this application, but then I read their Privacy Policy. The app is meant to harvest information from your system, and collect big data. And they will share everything with their partners: https://justgetflux.com/news/pages/privacy/

Screen flickers while fast user switching.

Great little app to reduce sleeplessness due to effect of blue light on diurnal rhythms. The only problem I have with it is its name. The official name should not have a "." in it as this indicates an extension in proper computer naming conventions. In addition, the actual app name is confused with several other apps named Flux, such as the popular web development app. I recommend that the creator of "f.lux" change the name to "F-lux" (or "Kelvin" or "NighShift" or "Nocturnal" or something else) to avoid the app being overwritten by MacUpdate Desktop and to follow a better naming convention. I actually like the name "Kelvin" since that is the scale used for color temperature, which is what this app alters.

I wish the developer would have left well enough alone. The most recent feature -- notifications of how much time is left in sleep -- clutters my screen in the morning and there's no way to turn it off. All I can say is "What were they thinking?" Since there's no way turn this dis-feature off, I'm tossing the most current update and using the older release. Also, the new colors are to red. I don't like them so I use "Classic f.lux" instead. Stop messing with something that works.

I don't understand what motivates the developer aside from benevolence—this app is so good I would gladly pay for it, and more than just a couple of dollars. As an inveterate night shift worker, I've used environmental light colors for years to maintain a regular sleep/wake cycle away from work. Finally I can do the same thing on my laptop.

The app is based on solid science and the interface is exceptionally polished. The ability to tweak settings is well thought out and incredibly useful. I tweaked the color temps, especially the default sunset color. The darkroom mode is something I hardly ever need (back in the day, I worked in darkrooms and had a home darkroom), but it's also great to have when one needs it. (Note: I do wish that that mode were tweakable.) The devs were smart enough to make f.lux disable itself when Photos is in use. [I haven't seen what happens if other color-dependent photo or art apps are in use.]

One of the best apps I've used, and I've been on Apple gear for three decades. Kudos to the devs!


Highly recommended

This was useful for a while... until I realized it alters the color of every screenshot. Be careful if you want accurate screen shots.

A really nice and useful app - And its still free. Thank you and well done!

Feature request: 1. I can't set more than 3500K and less than 5000K for bedtime mode. Why? The only option is to set less than 3500 or 5000K (which means night mode is off and it's same as sunset). But I want to keep Sunset at 5000 and have bedtime mode a bit higher than 3500K. It doesn't allow me to do it. I am on custom colour option. 2. The application menu could have option to override the current mode till the next mode change. For example during night, I'd like to set the sunset mode manually. In the morning the the mode would change to daytime mode and continue to follow the schedule. This is useful in case I don't want to disable f.lux completely by changing to daytime mode, bur rather change to a more comfortable sunset mode. Thanks.

Can't really use it. Not sure if it's just me, but when the app changes to sunset- or night-mode, I get reddish screen. The colours become red tinted. I would expect to be able to adjust the colour change through RGB sliders or Gamma or something, or just be able to set the screen to get gradually darker. This app seems to decrease the G and B spectrum while leaving the Reds. Not effective way to prevent eyestrain, in contrary, my eyes ache after a few minutes, I have to close it. It's a great application and idea but what is with this red tinted colours. I have Mavericks, Dell monitor with proper ICC./ICM colour profile loaded in Display settings (colours are perfect by the way).

Отличная идея!

Simple and effective. I've tried many screen utilities over the years and this is the only one I've decided to launch on login. I had already discovered when using a tablet for reading that a warmer color scheme like "sepia" will make me fall asleep easier along with causing less eye strain. To see such an elegant solution for my Mac is wonderful. It may not be possible, but if this developer could implement f.lux functionality into an Android/iOS app then I'd buy it for sure.

I really like this tool. Unfortunately I got a weird bug running it under Yosemite: As soon as the app starts, my mouse cursor begins to "skip ahead" every second. Quitting it or selecting "Disable for an hour" and the cursor is back to normal. I hope there will be a fix. Keep up the good work!

Excellent little app, and I tested a bunch of them before picking this as the best. Stable, easy to use, can dim your screen WAY down, and doesn't affect the screen brighteness or color at the brightest setting. Plus you can just switch it off to watch a movie, and keep your settings. I use it in combination with f.lux, which color-shifts the screen but doesn't dim it.

Great app! The only improvement I could hope for would be to add different durations for the dim effect (2 or 3 hours). For those having blinks if used together with Shades, you can instead use Shadeit! (version 1.1) which doesn't conflict with F.lux. ;-)

A piece of software that provides a feature that should be standard on every Mac and iOS device. I'm really pleased that it remains in active development. The only thing I wish it had was a built-in update mechanism.

I have downloaded f.lux for Mac OS 6 five times (latest versions I could find) and none of them open. What am I doing wrong?

If I could choose only 5 utilities to have on my Mac Flux (formerly f.lux?) would definitely have to be one of them. Once you've used it for a couple days or well nights, because night is when it works it's simple magic, you simply can not go back to a normal colored screen. Such a simple, elegant idea to solve a big problem. I sleep much better now and have far less eye strain, totally addicted. The naming is a bit confusing, it used to be f.lux and there is another app for developing websites called Flux so I think the name should be changed to distinguish itself but this has no impact on the simple awesomeness the app does when the sun goes down. I think this may be my first ever 5-star rating on MU!

I've been using Flux for a while and like it. Never had a problem with it and works as advertised. That said, it would be nice if this update page would say what is new with this release. Went to the developer's site and there is no obvious version release page available. In addition, the "about Flux" feature doesn't tell which version it is. I apparently don't have the hitherto newest version, so may this has been added. At least with my version there are two transition states: fast (20 sec) and slow (1 hr). Seems an intermediate one would be good, say 20 or 30 minutes; perhaps that has come along in the updates.

Please add a toggle so it doesn't remain in the menu bar. I have too many menu bar icons already! Other than that, it's great.

How do you reset the prefs or, if necessary, turn it TF off?

I think the developer and Mac Update got their wires crossed. When I used the link on this page I got an old version of Flux. I had to go to the developer's web site to get what is apparently the current version, 12. As far as I can tell the version listed on this page, 13 doesn't exist.

LOVE this software and have used it for months, but what is the update? I downloaded it but there aren't any apparent changes.