Use APKPure App
Get Screen Brightness Tool old version APK for Android
Adjust the brightness even lower than the system.
This software is suitable for use at night, you can adjust the brightness even lower than the system.
Feature
(1) Screen brightness adjustment.
(2) Add a filter on the screen (you can adjust the brightness even lower)
Of course, you can also set [Automatic brightness] plus matte, so you can automatically adjust depending on the system, and darker.