Privacy Filter -Cut Blue light, Screen brightness- play online

This app reduces screen brightness and blue light.
And you can protect your privacy by applying this that makes it harder to read your screen when you are watching a browser, email, messenger apps.

You can turn on a filter very easily from the notification panel or notification area.
So this app doesn't use notification space.

In addition, you can save your device battery if you set a dark color as the filter.