This app was mentioned in 7 comments, with an average of 1.14 upvotes
I am using EasyEyes and I can't complain. You can create schedule and adjust brightness and colour temperature, it also has quick toogle button.
https://play.google.com/store/apps/details?id=com.palmerin.easyeyesfree
https://play.google.com/store/apps/details?id=com.palmerin.easyeyesfree
My personal preference for amber tinting
In addition to F.lux on the PC.
Easy Eyes on Android https://play.google.com/store/apps/details?id=com.palmerin.easyeyesfree
It's what I use f.lux for or EasyEyes on Android. The only problem with F.lux is when gaming you tend to loose a few FPS.
that looks like my phone when my EasyEyez app turns on for the night.
Easy Eyes for Android works wonderfully and is integrated with the original brightness bar.