I would recommend turning the brightness down to near zero. Combine this with Dark Reader for websites (Firefox) and using a white or grey on black night reader mode in ebook reader apps. At first, the display will appear almost unreadable, but your eyes will quickly adjust.
Thanks to all
Android has had this built-in for a few releases now.
@Tucumano88 Settings > Display > scroll all the way to "color"
Might be heavily dependent on OEM and Android version.
On Samsung, it's called Eye Comfort Shield, for example.
@Midnitte right. I didn't think about this, sorry 😁 however, modern Android versions have this option built-in. I used Twilight as well in the past, however, I no longer feel like I need it.
I just manually turn on "Night light" if I need it before it automatically kicks in. I think that's available in stock, but I only have LineageOS on my devices.
I use it, but I don't notice any difference in my sleep quality
That is a blue light filter, so you shouldn't need a third party filter. The science just isn't out there to show whether or not it helps with sleep, though. It might help, but other things like not using screens within a couple hours to bed and not using phones in bed has better outcomes.
Maybe because the whole "blue light in displays" has no real effect on our sleep
I can't say I notice any difference, either**, but it does seem like it reduces headaches for me and makes it easier on my eyes in low light.
** I'm an insomniac, so "better sleep" is often "any sleep I can get" lol.
Twilight works pretty well
