Screen Tools is a free Android app developed by Anatoliy Lukyanov that provides users with a set of useful features. The app allows users to draw a grid over other applications to get the value padding and component size, whether on their own applications or on other developer's applications. Additionally, users can access various information about their device's screen, such as physical screen resolution, resolution available for application, screen density, screen classification, and other main information.

The app's interface is straightforward and easy to navigate, making it accessible for users of all levels. It is a handy utility for Android users who need to check the specifications of their device's screen or want to develop their own applications. However, the app lacks some advanced features that other similar apps may have. Overall, Screen Tools is a useful and reliable utility that can be downloaded for free from the Google Play Store.