Inclusion Criteria:  Patients aged 9-16 years old with ADHD assessed by Conners 3 scales Parents and children giving informed consent Patients in follow-up list of participant centers Patients with unchanging care for the last 3 months (medication and therapy)  Exclusion Criteria:  Patients with severe psychiatric disease such as schizophrenia, bipolar disorder, or autism spectrum disorders and suicidal behavior (all assessed by Child Behavior Checklist Scale) Patients with no smartphone or not easy access to smartphone (ie patients of social facilities, internship…) Patients with mild to severe mental retardation or that may obviously not be able to use the app Patients included in special program other the Care as Usual (defined in the ADHD French network) in follow-up list. Patients with Methylphenidate treatment or change of titration for less than 3 months.