rebless is an IoT rehabilitation device to help patients with stroke and musculoskeletal disorders. Every year the number of patients with stroke and musculoskeletal disorder rises, but hospitals, occupational therapists, and physical therapists have limited ability to meet their needs, which can slow recovery. With rebless, patients can exercise at home anytime. It offers five key features: the ability to rehab four joints (wrist, elbow, ankle, and knee) with one device, active or passive range of motion measurement, active or passive rehab modes, remote communication between patients and their therapist, and rehab data management through the app.