The Federal Trade Commission (FTC) in conjunction with the HHS Office for Civil Rights (OCR), the HHS Office of the National Coordinator for Health Information Technology (ONC), and the Food and Drug Administration (FDA) have updated the Mobile Health App Interactive Tool. This tool is designed to help developers of health-related mobile apps understand what federal laws and regulations might apply to them.
https://www.ftc.gov/business-guidance/resources/mobile-health-apps-interactive-tool