Berlin Umsonst is a lifestyle application available for Android devices, developed by The Sorcerers Apprentice. This free app provides a list of various free activities such as comedy, music, sports, dance, and other kinds of fun events happening in Berlin. The app offers a quick overview of what is happening in the city, making it easy to plan your activities.

It should be noted that the data displayed in the app is collected using web-scraping, and therefore, the quality of the events cannot be guaranteed. If you decide to attend any of the events listed in the app, you do so at your own risk.

The interface of the app is simple and easy to navigate. Users can filter events by date, category, and location. The app also provides a map view, making it easy to locate events. Overall, Berlin Umsonst is a useful app for anyone looking for free activities in Berlin.