A free program for Android, by DangoSoft Labs..

Blue Light Filter-protect eyes is an Android app that helps you filter and block blue light from your smartphone or tablet’s screen to reduce eye fatigue, improve your sleep quality, and reduce the risk of developing cancer. It can also help you to protect your eyes from the harmful effects of blue light.

How can I use it?

The app will allow you to adjust the filter by using an easy slider, so you can choose the best setting for you. You will be able to filter out the blue light from your screen. You can also change the transparency of the filter, so you can see through the screen and use your device as usual.

The app is very easy to use, and it has a simple interface, so you will not need to learn how to use it. You can also choose from a list of preset modes, so you can quickly change the filter settings.

The app uses a service to filter your notifications and lock screen, so you will not need to enable it in order to use the app. It is used only to filter your screen and does not collect any personal information.