FCHVs and FLHWs will be given 2 days training on Android mobile-based application usage. The app includes prompts regarding patients' current BP measurements and educational content on dietary habits, the importance of physical activity, and the harmful effects of smoking and alcohol consumption. FCHVs will conduct bimonthly meetings with groups of hypertensive patients. They will measure BP, enter it in the app, provide awareness and refer to nearby health facilities if needed. Data entered by FCHVs will be synchronized with FLHWs' accounts, allowing them to view the data entered by FCHVs. After a patient visits a health facility, the FLHW will take action as needed and record it in the app, thereby creating a linkage between the community and the health facility. Patients registered in the app will also receive weekly health education text messages on their mobile phones.

Usual care refers to the standard treatment that participants receive as part of their regular routine, without the research introducing any new interventions. The FCHVs and FLHWs in the usual care group will not receive training on application usage, and the participants will not receive text messages on their mobile phones.

Our intervention utilizes FCHVs as a bridge between the community and health facilities to improve HTN care. FCHVs and FLHWs will receive 2 days of training to use an Android app. The app provides prompts for BP measurement and educational content on healthy lifestyles. For 3 months, FCHVs will conduct bimonthly meetings, measure BP, height, and weight, provide awareness and enter sociodemographic details of participants into the app. Participants with BP ≥130/85 mmHg (unmedicated) or ≥120/80 mmHg (on medication) will be referred to a nearby health facility by FCHVs. The data entered by FCHVs will be linked to FLHWs' terminals. FLHWs will enter required information about medication use, referrals, and follow-ups into the app and take necessary actions for the treatment of referred patients. The intervention includes 795 participants from 10 clusters with BP ≥130/85 mmHg. Data on BP, medication adherence, quality of life, and physical activity will be collected at baseline and endline.

Change in systolic and diastolic blood pressure (mmHg) among hypertensive patients in the intervention group will be measured using a validated digital blood pressure monitor at baseline and endline. The outcome will be reported as the mean change in systolic and diastolic blood pressure.

Weight will be measured in kilograms using a weighing scale at health posts by healthcare providers or by FCHVs during group meetings. The measurements will be recorded in the application and later analyzed to assess changes in body weight.