Most of us use smartphones and wearables to count steps, track sleep, or log workouts. But the sensors inside these devices can do much more — from detecting changes in movement that may indicate neurological conditions to supporting recovery after orthopedic or geriatric diseases. In this talk, we will explore how data from the gadgets we carry every day can support diagnosis, monitor disease progression, and guide rehabilitation. Using practical examples, particularly from neurology, we will discuss how these technologies are already bringing medicine closer to our daily lives and paving the way toward more personalized care.