Clock is a free Android app developed by Rudolf Polzer, falling under the category of Business & Productivity. The primary feature of this app is that it works as a widget for Android devices up to version 8. However, it is not compatible with Android 9 or higher versions.

The app functions as a simple clock widget that displays the time on the home screen of the device. It is easy to install and use, with no complicated settings or configurations required. The widget is customizable, allowing users to choose from a range of clock styles and colors. Overall, Clock is a straightforward and useful app for those who want to keep track of time without having to open the clock app on their device.