Screen Darker is a free Android application developed by valas, categorized under Utilities & Tools. The app is designed to help users reduce screen brightness before bedtime, which can help improve sleep quality.

In addition to reducing screen brightness, Screen Darker offers several features that make it a valuable tool for users. It allows users to have cinema etiquette, as it reduces screen brightness without pausing a game. It also helps to reduce battery consumption. The app is user-friendly, with a simple interface that allows users to drag a red dot to adjust the level of screen brightness.

One of the standout features of Screen Darker is the "today quote" feature, which displays a quote in the notification panel. However, users should note that the app must be closed before installing new applications to avoid installation errors. It is also important to note that the Android policy prevents the install button from being pressed. Overall, Screen Darker is a useful app for anyone looking to reduce screen brightness and improve sleep quality.