Full Screen Brightness Filter is a very simple light weight brightness filter and contains no advertisements and no weird permissions.
Support all phones with android 4.1 and up.

Known ISSUE: All overlay filter interfere with manual apk installation via a File Manager. The work around is to disable brightness filter when you need to install an apk using a File Manager.

v.3 Improvement for newer and hi-resolution screen phones

Enjoy and thank you for using my app.