South Korea faces significant challenges in providing adequate rehabilitation for children with developmental disabilities, including limited hospital sessions, high private center costs, and long wait times. In response, Kim Jung-eun, CEO of JamJam Therapeutics and a parent of a child with cerebral palsy, developed JamJam400. The app leverages AI motion recognition to turn rehabilitation exercises into engaging games, helping children improve fine motor skills through activities like coloring and brushing teeth. This innovation aims to make therapy more accessible, effective, and enjoyable for children and their families.
JamJam400 primarily benefits children with brain lesions, autism, and other developmental disabilities who struggle with traditional rehabilitation access. The app is designed for use at home or in institutions, requiring only a smartphone, laptop, or TV, and costs 150,000 KRW per month—comparable to a single day of private therapy. Rehabilitation therapists from JamJam Rehabilitation Center tailor the difficulty and program to each child’s needs, and parents can try the app free for seven days before subscribing. The service has seen a 45% conversion rate to paid users and a 94% repurchase rate.
Development of JamJam400 began in 2023 after selection for the Korea Startup Promotion Agency’s pre-entrepreneur package, with further R&D support from the Korea Creative Content Agency. By 2024, the company secured 600 million KRW in investment and expanded the app’s reach to hospitals, welfare centers, and special schools, including Seoul Asan Hospital. In 2025, the program began targeting children with autism and was added to Gyeonggi Province’s assistive device support project, extending benefits to low-income and adult users.
Frequently asked questions include: How does JamJam400 work? The app uses AI to recognize hand and wrist movements, integrating them into games that motivate children to practice essential motions. What equipment is needed? Only a smartphone, laptop, or TV is required, with no expensive devices necessary. How is screen time managed? The app limits each session to 15 minutes to ensure healthy media exposure. JamJam400 is available nationwide and continues to grow through public and private support.
JamJam400 is a strong example of how AI and user-centered design can improve rehabilitation outcomes for children with disabilities. The app addresses systemic barriers in South Korea’s healthcare system, such as limited therapy sessions and high costs, by providing an accessible, engaging alternative. Its expansion into public support programs and high user satisfaction rates suggest significant potential for broader adoption. Ongoing support from both public and private sectors will be essential to ensure sustainable impact.