Introduction: To facilitate patient engagement and communication, mobile technologies are increasingly being integrated into health care practice. Currently, few applications exist specifically for patients with ventricular assist devices (VADs). As patients often live a significant distance away from the implant center, their VAD teams may be unaware when they present to an emergency department (ED) and unable to impact care in a timely fashion. We tested the feasibility of implementing a mobile phone-based geolocation technology that detects patient ED arrival anywhere in the United States and pages the VAD team in real time. Hypothesis: Implementation of a mobile technology that detects when patients arrive in an ED and alerts providers is feasible in a VAD population and acceptable to patients and providers. Methods: VAD patients were eligible for enrollment if they had a smartphone with Apple iOS version 9.0 or greater or Android version 4.2 or greater. Subjects were given free access to the mobile technology platform (Position Health, New York, NY), which was downloaded onto their smartphone. When a patient enters a geofence, the app is activated and asks if he or she wants to have the VAD team contacted. If yes, a “ping” is sent to the VAD team virtual pager containing the patient's MRN, name, and ED telephone number. A template in the EMR was used to document the results of the encounter. At 3 months, subjects responded to a phone survey regarding their experience. Results: Between October 2016 and March 2017, 54 patients (mean age 52 years, 20% female, 45% bridge-to-transplant) were approached, and 20 were successfully enrolled. Reasons for non-enrollment included lack of smartphone (n = 25), lack of required smartphone software (n = 3), and inability to retrieve app store password (n = 4). Two patients with the prerequisite smartphone requirements declined to enroll. Enrolled patients lived in 4 different states. With the exception of 2 patients who were removed from the study following heart transplant, only 1 patient withdrew. During the study period, the geofence technology was active for 1800 patient-days and activated on 5 occasions. In all cases, the patient was near or inside a hospital, but was not seeking emergency care. During the phone survey at 3 months, 90% of patients reported that the app remained active on their phones. Most patients responded favorably to their impressions of the app. Comments included that the app “gave them piece of mind,” was “convenient,” and was “helpful.” Conclusions: Our pilot study suggests that patients with VADs are eager to engage with mobile technology. Enrollment was limited by lack of smartphones or requisite software. False positive “pings” were due to routine healthcare being obtained adjacent to the ED. Additional studies are required to determine the success of software updates on true ED visits.