If a mobile health app does not address a specific problem, it will not be considered useful and subsequently not adhered to.
There are an estimated 15,000 medical apps presently on the market and is expected to grow 25% per year according to one study. There are issues which are common in the development of these apps and other categories of apps. However, some technical and non-technical issues are unique to the sector. As someone who does not design apps, I will offer a perspective which covers topics raised by different stakeholders concerning medical app development which might be of interest.