Between two consultations, is a patient getting better or quietly getting worse? Wearables and phones stream heart rhythm, sleep and movement around the clock; the hard part is trusting them and telling stress from a coffee, a run or a bad night. The team will turn these everyday signals into a measure of change from each person's own baseline, decide who should hear about a meaningful shift and when, and keep alert fatigue out of the loop. Open wearable datasets, foundation models for physiological signals and language models are on the table, along with the outline of a first study with patients. One lead worth chasing: the body clock as an early signal.