I’ve rooted my device to get an acceptable blue light filter on my phone (1500K), I really don’t like the idea of having to root just for that and play the cat and mouse game to hide the root. Any other way to do it? I’ve looked everywhere and nothing is close to what I want. The default night light in the settings barely goes below something like 2500K and the LiveDisplay feature in lineageOS and Calyx mess up the colors and there is a lot of blue that is not filtered at all. Anything you guys found?
If I understand the technical side of things properly, a proper filter (not just an overlay) has to be implemented at the system level, so I think your only options are going to be an overlay, or something that works via low level access like changing ROMs or root access :/