Mobile applications (apps) for self-management of diseases such as diabetes and for general well-being, including keeping track of food, diet, and exercise, are widely available. However, consumers face a flood of new mobile apps in the app stores and have no guidance from clinicians about choosing the appropriate app. As much as clinicians would like to support a patient-centered approach and promote health and wellness mobile apps, they may be unable to provide advice due to the lack of comprehensive and reliable app reviews. This research reviewed a selection of health and wellness mobile apps suitable for the self-management of gestational diabetes mellitus (GDM). A prototype of an ecosystem that integrated the data generated by the apps was built and its usefulness and ease of use were evaluated. The results show that the ecosystem can provide support for GDM self-management by sharing health and wellness data across the diabetes clinic.