“…These mHealth interventions have been applied to monitoring postoperative care [2,3], diabetes self-management [4,5], smoking cessation [6,7], care and prevention of HIV and other sexually transmitted diseases [8], and more. As these interventions begin to spread throughout healthcare, there has been a growing interest in the response to these applications, including topics such as acceptability and feasibility [2], satisfaction by patients and providers [5], and efficiency [4]. However, there is limited research measuring users' comfort in operating smartphone functions, and whether comfort increases as a result of engagement with these applications.…”