The participants are able to receive the services offered by this program. During the six-month program, the lay health workers deliver the free meal provided by Food Angel at the participants' home and measure the participants' vital signs including blood pressure, pulse, oxygen saturation, and pain level (if any), and they upload the results to the mHealth app subsequently. During the 6-month program, the participants receive eleven home visits from a nurse. During the first month, the nurse visit the participants weekly. The nurse visit the participants twice a week for two and three months. The nurse only visit the participants once a month between the fourth and sixth month. The nurse conduct a comprehensive health assessment and establish some health goals with the participants during the home visit. She formulate an individual care plan, and record them on the app for the lay health worker to follow-up.

Three separated semi-structured group interviews with healthcare professionals, lay health workers, and older adults will be conducted to explore their views on facilitating, hindering factors, and the acceptability of implementing the program in the community at six months.

Incidence of report of adverse events that is encountered by the older adults, lay health workers, and healthcare professionals will be measured to assess the safety of the program.

A performance checklist that developed by the research team according to the workflow of the program will be used to identify whether the program is implemented as intended. The principal investigator of the research team will pay random quality assurance visits to evaluate whether the provided interventions are adhered to the planned content, duration, and frequency of the contact sessions.

The number of older adults and lay health workers who are eligible, invited, excluded, and enrolled to participate in the program will be counted and compared to non-participants on key demographic data such as age, sociodemographic background, and living area.

The project manager of the study will be asked about the feasibility of the recruitment procedures, and the appropriateness of the eligibility criteria.

Blood pressure measurement will be performed after 10 minutes of sitting rest. A standard electronic sphygmomanometer will be used to measure supine blood pressure on the right arm of each candidate (unless contraindicated). The results on blood pressure will be divided into systolic and diastolic blood pressure.