With the global growth of the market for smartphones new business ideas and applications are developed continuously. These often utilize the resources of a mobile device to a considerable extent and reach the limits of these. In this work we focus on the simulation of an on-demand music service on a modern smartphone. Our simulation model includes higher level descriptions of the necessary hardware components’ behavior and their energy consumption. Thereby, the detailed simulation of battery plays a key role in the project. With this simulation study we find optimal parameters for the users of the examined application to maximize playback time, improve its battery life and reduce costly data transmissions.