Screen Stopwatch is a free Android application developed by Google Creative Lab. The app is categorized under Utilities & Tools and is a part of Digital Wellbeing Experiments, a platform that aims to provide ideas and tools to help people achieve a better balance with technology.

The app's main feature is to track and display the time spent on the phone. Every time the user unlocks the phone, the stopwatch continues to count the time until the phone is locked again. This feature is useful for people who want to monitor their phone usage and reduce the time they spend on their phone.

Overall, Screen Stopwatch is a simple yet effective app that can help users be more mindful of their phone usage. It is an excellent tool for those who want to develop better digital habits and limit their screen time.