Can TElemedicine System Replace Doctor Consultations to Achieve Non-inferior Blood Pressure in Patients With Controlled Hypertension

This study is testing whether a telemedicine (remote care) app called HealthCap can manage blood pressure in patients with controlled hypertension just as well as regular in-person doctor visits. If successful, this could reduce the need for frequent clinic appointments for people whose blood pressure is already well-managed. **You may be eligible if...** - You have been diagnosed with essential hypertension (high blood pressure not caused by another condition) - You are currently on blood pressure medication - Your blood pressure is well-controlled based on home or ambulatory blood pressure readings (below 135/85 mmHg, or 130/85 mmHg if you have diabetes, kidney disease, or heart disease) - You can read basic Chinese (the language used in the HealthCap app) - You have used any mobile app in the past year - You are between 18 and 80 years old **You may NOT be eligible if...** - You are unable to give informed consent - You are unwilling to do home blood pressure monitoring - You have atrial fibrillation, work night shifts, or have bleeding tendencies (making blood pressure monitoring difficult) - You have a serious mental illness affecting your ability to use the app - You have other conditions requiring regular medication changes (e.g., poorly controlled diabetes, active cancer) - Your expected survival is less than 1 year Talk to your doctor to see if this trial is right for you.