Mobile Health applications (mHealth apps) have become integrated into the field of consumer health informatics as tools that maintain a patient-centred model of health care by allowing consumers to monitor their health related problems, understand specific medical conditions and attain personal fitness goals. However, mHealth apps may comprise significant risks to the privacy and security of consumer’s protected health information. The aim of this project is to investigate the strengths and limitations of data privacy and security in the most popular mHealth apps on the market. This project involves a systematic literature review and a comparative analysis of the 20 most popular mHealth apps to identify a set of risk and safety features that can assist consumers in the selection of mHealth apps and provide guidelines for the development of mHealth apps with appropriate security and privacy measures.