Using a participatory action research approach, this study evaluated a smartphone app intended to empower surgical patients and caregivers to help optimize their care. Forty-two patients were enrolled in the study and they underwent a variety of different surgical procedures. Most patients felt that app was useful and informative (79%), was easy to use (74%) and helped participants to ask better questions (76%) and feel more involved in conversations about their care. However, almost half of participants (48%) were unsure about how the app could affect safety, citing that safety was the responsibility of the clinical staff alone rather than patients.