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「Night Screen」is a Material Design Application which can protect your eyes from being hurt by screen, creating a mask at the top of screen in order to make screen darker. We can solve the problem that the lowest brightness is not low enough in some devices.
(PS: Even though you are using our application to make screen darker, you should reduce the time watching screen in a dark environment.)

( Enable permission in Android 6.0: "Settings" app - "Apps" - The gear icon - "Draw over other apps" - "Night Screen" - Then enable it )

Otherwise, this application is open source under GNU GPL v3 License.
Github Repo:

From version Night Screen 2.2.0:

- Update French/Turkish/Polish translation & Improve English translation
- Update UI
- Add more options
- Add open source licenses
- Fix foreground service permission in Android 9

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All versions
March 1, 2019
November 23, 2017
June 26, 2017
January 15, 2017