of smartphones and mobile applications into clinical practice. It provides step-by-step instructions for measuring flexion, extension, rotation, and lateral movement across major joints—including the shoulder, spine, knee, wrist, and more. With a strong focus on accuracy, usability, and real-world application, the guide highlights how mobile technology enhances movement analysis, supports remote patient monitoring, and streamlines the assessment process in both clinical and home settings. Whether you're conducting in-person evaluations or remote assessments via telehealth, this resource delivers the knowledge and tools needed to improve mobility outcomes, ensure consistency in measurements, and bring innovation to modern joint assessment practices.