Effectiveness and Cost-Effectiveness of a Digital Care Pathway and Asynchronous Communication for Patients With Hypertension

The goal of this clinical trial is to learn if digital care pathway (DCP) and digital non-real-time messaging, in other words, asynchronous communication (AC) with nurse works to treat high blood pressure in adults in primary care. It will also learn if DCP and AC are good value for money. The main questions it aims to answer are: * Does DCP and AC lower systolic blood pressure? * Are DCP and AC good value for money in treating high blood pressure? Researchers will compare usual care plus DCP and usual care plus DCP with AC to usual care only to see if DCP and AC works to treat high blood pressure. Participants will: * Get usual care or usual care plus DCP or usual care plus DCP with AC for 6 months * Visit the study nurse at the start of the trial and after 6 months for checkup and tests which include usual laboratory tests for high blood pressure * Answer online survey questions and measure their blood pressure at home for 4 days at the start of the trial and after 6 months

Inclusion Criteria: * a diagnosis of hypertension for at least 3 months * an office blood pressure of ≥140/90 mmHg at baseline * access to a smartphone and the ability to use strong electronic identification for application login * ability to measure home blood pressure * ability to take care of the personal medication Exclusion Criteria: * unwillingness to participate in the study * secondary hypertension or hypertensive crisis (office blood pressure \>200/130 mmHg) * atrial fibrillation * stage 4 or 5 chronic kidney disease (eGFR \