Rationale: Wearables have the potential to monitor patients remotely. The Corsano CardioWatch 287-2 is such a medical device that can monitor long-term blood pressure. The device has been validated using clinical trials in hospitals, but evaluation in the intended remote setting during treatment is lacking. Primary objective: To assess the ability to track blood pressure decrease measured by the Corsano CardioWatch 287-2 after a period of 28 days of antihypertensive drug treatment initiation, uptitration or change in antihypertensive drugs. Study population: A group, untreated or treated for hypertension, with uncontrolled BP and medical indication for antihypertensive drug treatment initiation, uptitration or change in antihypertensive drugs. Study design: Blood pressure will be measured by the investigative device and a reference device at pre-treatment and after 28 days. The investigative device is the Corsano CardioWatch 287-2, which measures blood pressure through optical photoplethysmography (PPG). The reference method involves automatic blood pressure cuff measurements. Main study parameters/endpoints: Absolute systolic and diastolic blood pressure decrease after change of treatment measured by the Corsano Cardiowatch 287-2 after 28 days, compared to automatic blood pressure cuff measurements.