The biggest challenge facing clinical research today is the need to gather, analyze, and report data. To collect patient data more efficiently, the industry has turned to electronic patient-reported outcome (ePRO) tools, which allow patients to enter data themselves, most often on devices provided to them. With more than three-quarters of Americans owning smartphones, it is only natural that researchers are increasingly exploring bring-your-own-device (BYOD) strategies for their trials; that is, allowing patients to utilize their own devices to collect data within the context of a clinical trial.