This document discusses different business models for apps, including paid apps with prices from 8 to 7,999 DKK, free apps that offer services or enable new business opportunities, and apps that generate revenue through digital content, subscriptions, advertising, or integrated purchases. It also provides examples of apps for each model like paid apps Mymo and TravAlarm or free apps ParkPark and Mapop. The document concludes by mentioning combinations of models are possible and thanks the reader.