Dortmund-App is a local guide to life, work, and events in Dortmund, bringing useful city information together in one place. The platform highlights upcoming events and leisure activities, local businesses, job opportunities, news, and special offers. Its directory covers a wide range of providers, from restaurants, cafés, hotels, and event organisers to sports clubs, cultural groups, charities, and community initiatives. Visitors can also explore businesses and services in areas such as consulting, property, marketing, mobility, construction, repairs, health, beauty, retail, and specialist crafts.

Alongside its listings, Dortmund-App publishes updates about the city and wider topics, including transport, public works, local government, education, safety, culture, sport, and community life. News articles and practical information help residents and visitors keep up with developments and discover activities around Dortmund. Businesses can also find information about becoming a partner, while users can access contact and imprint details through the site. By combining local discovery, business visibility, job information, and current news, Dortmund-App serves as a broad online resource for people interested in Dortmund.