Redshift was inspired by F.lux. I actually use Redshift since F.lux is not available in linux, but Redshift has no mobile versions.

>since F.lux is not available in linux

I've run it on my Ubuntu install for quite a while, at least a year I think? Am I missing something?

https://justgetflux.com/linux.html

strange! i was convinced that I started using redshift due to f.lux's inavailability... my bad!

Well, Redshift is a lightweight program that also works, and has a simple-to-use shell command. That's attractive to some Linux-users :)

And it goes all the way down to 1000K, leaving only the red channel :) Which is not particularly useful, but it does make Redshift literally cooler than F.lux.

Weird. I distinctly remember installing and using it on my Linux boxes. https://justgetflux.com/linux.html