To the Editor We agree with Dr Patel and colleagues1 that wearable devices have significant limitations. One potential solution offered by the authors was the use of smartphones to facilitate health behavior change.
According to a recent review, more than 160 apps for smartphones are available to increase medication adherence.2 Furthermore, search queries for human immunodeficiency virus (HIV) identified 1937 apps aiming to improve adherence and reduce risky behaviors.3
Miguez-Burbano MJ, Ergon E. Use of Wearable Monitoring Devices to Change Health Behavior. JAMA. 2015;313(18):1865. doi:10.1001/jama.2015.3530
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