This app makes your display darker than minimum brightness of your phone setting. If you get tired eyes with display glare in midnight or at bed, this is useful.

This app makes a semi-transparent filter overlaying on the screen. You can just run this app and adjust brightness of display, and do your reading job.
For your convenience, you can see notification icon at status bar when no light or low light . From which you can run this app or pause it if it is already running. This app stops if it detects high light when you turn on the display.

* notice: This app uses overlay window over other apps. If you have problem installing other apps, turn off this filter during the installation job.