Conclusions
ACKL
Sustained mHealth app usage is important to the health of the older population, but it poses challenges to both researchers and app developers. The results of the present study indicated that the personalized and proactive nursing support may be one of the solutions that can maintain the app usage among community-dwelling older adults in long term. Further research is needed to determine the most efficacious mHealth app feature or combination of features to maintain or motivate sustained usage.The authors would like to thank all stakeholders who participated in and contributed to this study. They would also like to thank Smartone for collaborating with the research team.Authors' Contributions: AKCW and FKYW conceptualized the program. AKCW, JB, FKYW, KKSC, and SMW provided intellectual input on the study design, methodology, and evaluation. AKCW, JB, and ACKL drafted the manuscript. All authors contributed to, reviewed, and approved the manuscript.Conflicts of Interest: None declared.App usage frequency and duration.Absolute change in outcome scores among all groups.CONSORT checklist.