Training individuals with upper limb differences to use myoelectric prosthetic hands is often challenging and inefficient. Traditional in-clinic training is physically demanding, unengaging, and restricted to medical environments, limiting practice opportunities and real-world application. GraspVR addresses these issues by leveraging virtual reality for a more accessible and engaging training experience. It allows users to practice with weaker arm muscles without the weight of a prosthetic, reducing discomfort and enabling more frequent, cost-free practice outside the clinic. Its VR mini-games make training fun, while performance tracking provides valuable feedback. By integrating clinical simulations and immersive activities, GraspVR enhances prosthetic hand training for real-life use.