The document discusses the FDA regulatory approach for mobile medical apps. It defines a mobile medical app as a mobile app that meets the definition of a medical device by either being an accessory to a regulated medical device or transforming a mobile platform into a regulated device. The FDA has issued guidance indicating which mobile medical apps fall under regulatory requirements based on their intended uses, interactions, and determinations of functions like amplifying or measuring. Mobile medical apps must go through the same FDA regulatory process as other medical devices, being classified based on their risk level and whether substantial equivalence to other devices exists.