This document provides an overview of developing healthcare apps. It discusses the growth of the healthcare app market, different types of apps including wellness, medical, and healthcare apps. It then outlines five steps for building a scalable app, including defining the problem, planning architecture and features, selecting technology, implementing security, and testing. It also discusses monetization models such as freemium, paid, in-app purchases, advertising, and data licensing. Examples are given of popular global healthcare apps and how AI, blockchain and other technologies can enhance future app development. The cost of developing an app can vary based on complexity, features, platform and development team location.