This observational study aims to examine the relationship between trunk postural changes measured using a mobile application (Biotonix Posture Assistant) and spinal curvature assessed by radiographic Cobb angle in adolescent females with idiopathic scoliosis. Thirty girls aged 14 to 17 years with moderate scoliosis will undergo a single posture assessment using the mobile application and a standard spinal X-ray. The study seeks to determine whether mobile-based postural measurements can reliably reflect radiological findings, offering a non-invasive and radiation-free option for screening and monitoring spinal posture in adolescents with scoliosis.