Clinical Challenge is an app aimed at learning to recognize and interpret heart and lung sounds, specially developed for Medicine students at Erasmus MC. You go through various lung or heart cases in the app. After a brief description of the patient and a first impression based on general examination and measurements, you then listen to the patient's heart or lung sounds by auscultation or percussion. After this, you identify the abnormal sound (location and type) and make a diagnosis. Education. Go through the relevant case for each education, to be well prepared to come to the contact education and to become better at recognizing and interpreting abnormal lung and heart sounds!