With the digitalization of healthcare, mobile apps are also becoming increasingly relevant. This narrative literature review examines the general expectations and requirements of patients for mobile health apps based on scientific studies from the last 10 years (2014-2024), identifies specific functions and features and summarizes the acceptance factors. The results show that mobile health apps should primarily serve the success of treatment. Specifically desired functions include data entry and automated tracking, reminder and alerting, personalization and customization, education and information as well as data sharing and connectivity. Perceived usefulness and ease of use are among the most important acceptance factors. Personal support from healthcare professionals also plays an important role in some contexts. Various further research directions are discussed. Future research could for example focus on the question of how specific functions affect user satisfaction and user loyalty once they have been implemented.