DAC is an Android app developed by Danish Architecture Centre that provides theme-based city tours in Copenhagen. The app comes with experienced and knowledgeable guides who take you on a journey through the city streets. As you walk, your smartphone displays the route and provides you with textual and visual information about the places you encounter.

The tours are designed around different themes, giving you a unique perspective on the city's history, culture, and architecture. The app is free to use and is a great way to explore Copenhagen at your own pace. In addition, the Danish Architecture Centre welcomes feedback and suggestions to improve the app further.

Overall, DAC is a well-designed app that offers an innovative way to discover the city's hidden gems. It is easy to use and provides valuable insights into Copenhagen's rich heritage.