Please help me create a data flow diagram (DFD) and child diagram from this context diagram . Diagram is for a Health Tracker App.

A healthy lifestyle is vital to our overall success in life. Keeping track of the essential elements is imperative to a good healthy life. The application, Health Tracker, will help the user track heart rate, blood pressure, blood sugar, exercise level, etc. The tracking application will notify if the level is above or below the mentioned limit. It will also help users track their weight, height, daily nutritional intake, recommend a weekly diet and provide other helpful suggestions.

Entities - Patient - Doctor Health Provider/ Insurance Body Tracker Vitals Monitor Scale/Body Measure Food Tracker Activity Tracker - Planner General Body Examination Entities - Patient - Doctor Health Provider/ Insurance Body Tracker Vitals Monitor Scale/Body Measure Food Tracker Activity Tracker - Planner General Body Examination