The document discusses methods for evaluating mobile health interventions and describes one randomized controlled trial. It summarizes an informal search that identified 486 mobile health projects funded in the last 6 years, including 29 actual interventions that varied in type. It then describes the design of a clinical trial evaluating a mobile diabetes intervention, including using change in HbA1c as the primary outcome and measures of symptoms, depression, and satisfaction as secondary outcomes. Finally, it discusses challenges in evaluating mobile health interventions.