Figure 2

Number of Healthcare Applications per OS Platform Discussed in this Study. This figure presents the distribution of the smartphone-based healthcare applications that are discussed in this study for all of the six major OS platforms. The distribution is describes in two categories: the first breakdown is according to the intended users, that is, healthcare professionals, medical and nursing students, and patients; and the second breakdown is according to their latest release or update date, that is, recent (latest update in 2011), contemporary (latest update during 2009 to 2010), legacy (latest update on or before 2008), or prototype (not released yet for real use).