I developed Muspire, a Java-based app that uses intuitive icons to make music composition accessible to everyone. I conducted user testing with musicians with developmental disabilities to improve accessibility and added a feature for users to record their own sounds for personalized compositions. The app was recognized by the Korean National Assembly and Jeju Island for its innovation. Moreover, I taught bi-weekly classes with the Muspire App to help people with disabilities create music and gathered feedback to improve the app.