The WiSAT is a sensor-based activity tracker aimed at encouraging in-seat movement among wheelchair users who are at risk of pressure ulcers. This device targets the prevention of pressure ulcers (PrUs) by informing wheelchair users about their weight-shifting activity as a means to promote healthy behaviors and prevent pressure ulcers. WiSAT will have impact on wheelchair users, their clinicians, and researchers. Such a product can empower wheelchair users with knowledge about their behaviors associated with PrU prevention. The WiSAT’s impact will extend beyond wheelchair users by also meeting the needs of clinicians and researchers by allowing real-world data to be collected easily and quickly. During rehabilitation interventions, clinicians educate persons with spinal cord injuries about PrU prevention. One aspect of this education is the training of a pressure-relief regimen that seeks to regularly shift weight off the load-bearing tissues of the buttocks.