Multi-center, Single Blinded, RCT, Pivotal Study to Evaluate the Efficacy and Safety of DTx to Improve ADHD

Inclusion Criteria: * Subjects must meet all the following inclusion criteria: * Children and adolescents aged 6 years or older but under 13 years, both male and female. * Diagnosed with ADHD according to DSM-5 criteria or ICD-10 diagnosis of ADHD (F90.0). * K-ARS scores of 18 or higher for females and 22 or higher for males. * No changes in ADHD medication dosage or regimen within 1 month prior to enrollment (\*For those receiving pharmacological treatment with methylphenidate or amphetamine-based products, a washout period of 14 days is required if they wish to participate after discontinuing medication). * Medically healthy based on medical history and vital signs assessed during screening, without other medical abnormalities. * Able to use a smartphone or tablet PC that meets specified requirements to operate the mobile application without difficulty. * Both the subject and their guardian voluntarily agree to participate and provide written informed consent. Exclusion Criteria: * Subjects will be excluded if they meet any of the following criteria: * Presence of any of the following psychiatric symptoms at baseline: chronic tic disorder (requiring medication), Tourette's disorder, or history of major obsessive-compulsive disorder, schizophrenia, bipolar disorder, post-traumatic stress disorder, conduct disorder, or other childhood psychosis (affective disorders are not exclusionary). * Wechsler Intelligence Scale for Children (WISC) score below 80. * Presence of congen…