ok I flipped the development mode switch off!

what is it?

Hmm, will check it out.

@lorna Hi, I'm using f.lux daily, like many, on each of my devices at home and at work.
I hear that you have limited resources, do you have plans of opening up to contributions by any chance? I'd be more than happy to help on my free time and contribute the best I can to help you out. I'm sure many of us developers would love that.
Is there a way? Maybe you don't want to give away your main dimming algorithm, and that's totally fair since other options are rubbish, afaik. But couldn't you branch out the rest and let us help with UX/UI, Android and other platforms integration and whatnot? You name it, you merge it! Or am I just being naive right now?

Certainly, the question's been asked before, it's not in your FAQ though so I'm giving it a try :)

Compositor is the only one that change my screen color, if i choose the other 2 options my screen remains the same

CF.lumen requires an internet connection for its location feature, so it's quite inferior to all other apps.

Impossible. Live with it, use alternatives and please stop asking. Nothing personal, but this request is very annoying.

The Qualcomm driver isn't working anyway. So right now f.lux is quite useless with current phones. Compatibility mode affects performance way too much. Check it out in SkySafari.

By the way, no releases means no evolution. f.lux is already dead to be honest.

Thanks, but I posted this over a year ago, and in that time f.lux did come out with a version that worked.

Hello. To get root access, you need to root your phone. That means: you have to make some modification on the software of your phone in order to give for yourself or for some app a high level of permission to access and modificate some parts of the software that are normally hidden and not accessible.
Flux app needs this root permission.

To do the rooting, you have to connect your phone on a computer. Then a special program from your computer will install something on your phone that alters the software on the phone, making it permissive, that means rooted. Please note that rooting your phone is risky for three reasons:
(1) if something goes wrong during the process of rooting, you could damage your telephone, it could be definitely broken.
(2) : Rooted device has security vulnerability due to its permissive state that could allow potential hacker to get access to it.
(3) Your guarrantee is now void if you root your phone. This because you alter the manufacturer's settings.
For further details on how to root a phone, please check here:
https://www.xda-developers.com/root/

I actually solved this by reinstalling SuperSU.