A free program for Android, by Nu-Kob.

Protect your eyes from harmful blue light from your phones and tablets with the help of Blue Light Brightness Filter app.

The app allows you to adjust the brightness and reduce the blue light from the screen of your mobile device. You will be able to lower the brightness and change the screen color into a natural one, which can help you reduce persistent eye strain.

It is so simple and easy to use. All you have to do is to set the brightness and blue light percentage, and you are good to go.

You can find the app on the notification bar for quick access.