 This study aims to assess the effectiveness of a social incentive-based gamification intervention to increase physical activity in the 3 months after hospital discharge. To do this, the investigators will conduct a two-arm randomized, controlled trial during the 3-months after hospital discharge comparing a control group that uses a wearable device to track physical activity to an intervention group that uses the same wearable devices and receives a supportive social incentive-based gamification intervention to adhere to a step goal program. Patients will be enrolled during hospitalization from medicine and oncology floors into three phases. In phase 1 hospitalization, patients inpatient step counts will be monitored. In phase 2 week 1 post-discharge, patients will have a baseline step count estimated. In phase 3 weeks 2-13 post-discharge, patients will be randomly assigned to the control or intervention group. Patients will be considered enrolled in the trial if they complete the run-in periods phases 1 and 2 and then are randomized into phase 3. 