With the ubiquity of smartphones and, more recently, smart watches and fitness trackers, the potential to use these devices to monitor and assist patients with cancer has never been greater. Being able to monitor and respond to patient data through fitness trackers could help healthcare professionals provide swift, accurate interventions in the future. Our proof-of-concept study, “Wireless Monitoring Program of Patient-Centered Outcomes and Recovery Before and After Major Abdominal Cancer Surgery,” explored the feasibility and acceptability of using technology, including fitness monitors, to efficiently monitor patient-generated health data by answering the following questions: