This app is mainly about COPD (Chronic Obstructive Pulmonary Disease), which is a disease very prevalent in elderly. There are in total 6 chapters in the app introducing the disease, including its causes, symptoms, diagnosis, risk factors, etc.
Comprehensive articles about COPD
The app is totally free without the need of in-app purchase to unlock chapters and the knowledge covered is very throughout.
Tips for using the product
Use it as a textbook for your pulmonary physiology.