A unified and integrated approach to represent mHealth apps and their characteristics is currently lacking. To fill this gap, the overall purpose of this project is to develop an ontology, to help address the objective of building 'trustful' mHealth apps. This paper is a brief presentation of the followed methods, and the preliminary results of the research, i.e. a first version of that ontology.
Keywords: Protégé; Unified Modeling Language Class Diagrams; Web Ontology Language; mHealth apps; ontology development process.