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 doesnt use notification space.In addition, you can save your device battery if you set a dark color as the filter.* It works on Android12.* Fixed launched filter by notification on 2.5.0.