Background: Hypertension is the leading attributable risk factor for cardiovascular disease and death globally. In diagnosing and monitoring hypertensive patient population, home blood pressure monitoring (HBPM) has been shown to be superior to the office-based blood pressure (BP) measurement as a predictor of cardiovascular disease and total mortality. However, the conventional method of HBPM utilizing handwritten BP logbooks has known shortcomings, mainly attributable to inaccuracy and underreporting of data, as well as the failure to bring the logbooks to the regular outpatient appointments. In recent years, the availability of home BP devices with Bluetooth® technology on the market, the increasingly widespread use of smartphones, and the development of mobile applications (apps) that complement Bluetooth® enabled BP monitors have expanded the potential for an accurate log of BP data to be accessible to clinicians. Our study's primary aim is to compare the level of HBPM recording fidelity using smartphone app versus using a handwritten logbook among the multi-ethnic hypertensive patient population seen in a district polyclinic located in Pasir Ris, Singapore. Patient acceptability of the two recording modalities and the association between the home blood pressure recording fidelity and the patients' socio-demographic background, self-care profile, clinical factors, and level of exposure to technology is also assessed as exploratory aims. Our main hypothesis is that the level of fidelity in HBPM recording, defined as the proportion of scheduled number of home blood pressure readings that is successfully recorded, regimen compliant, and made available at the final follow up visit, would be higher for patients who use a smartphone app versus those who maintain a handwritten logbook.