In recent years, mobile phones have improved dramatically inboth design and function, from simple call and text devices tothe more sophisticated mini-personal computers known assmartphones. Smartphone owners are now more prevalent withinthe overall population than owners of traditional mobile phones[15]. Smartphones allow individual users to install, configure,and run specialized applications on their phone. Increasingnumbers of people are using these applications to self-managechronic diseases [13]. For example, Chomutare and colleagues[16] identified that in 2011 there were more than 260diabetes-related iPhone applications available for downloadfrom the Apple online store