Conclusions
AIDS
AIDS
In conclusion, we did not demonstrate the feasibility of using a GPS-based tracking app to characterize mobility and improve engagement in HIV care. Our most common problems that contributed to failure were a lack of mobile phone data, app uninstallations, phone changes, and missing heartbeat data. We are far less motivated to create a novel app in our future research endeavors and instead will use tools that people already are using, particularly WhatsApp, which all of our participants reported as their favorite app [This work was funded by the US National Institute of Mental Health (R34 MH118028) and based on earlier work that was funded by the US National Institutes of Health (NIH) under grant P30 AI110527 provided to the Tennessee Center for AIDS Research. TKP was supported by a Collaborative Initiative for Pediatric HIV Education and Research grant from the International AIDS Society and by grant K43TW011943 jointly supported by the Fogarty International Center and National Institute of Mental Health of the NIH. The funders had no role in the study design, data collection and analysis, or decision to publish or preparation of the manuscript. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH or other parties.The authors are most grateful to the study participants, without whom this work would not have been possible.Conflicts of Interest: None declared.CONSORT-eHEALTH checklist (V 1.6.1).