This app, by the American Academy of Orthopaedic Surgeons, presents the techniques for physical examination of the knee. The app presents video demonstrations for Inspection & Palpation (9), Muscle Testing (2), Range of Motion (2), and Special Tests (13). The program is ideal for medical students and residents. Each technique demonstration is preceded by a peer reviewed explanation of the procedure including possible diagnoses, procedural steps, positive test characteristics including statistical values for some tests, and other information, including references.