A Multicenter Study for Evaluating a Digital Support System in Childhood Obesity Treatment

Inclusion Criteria: * Age \>4.0 and \<17.0 years of age at inclusion * Obesity defined based on the International Obesity Task Force criteria iso-BMI 30 - 40 kg/m2 * Willingness to participate in an obesity treatment clinical trial * Family ability to communicate in the language of the country of residence e.g. write and read messages in the mobile application * Parents having a smart phone and an email address Exclusion Criteria: * Morbid obesity defined as iso-BMI\>40kg/m2 independently of age * Endocrine disorders other than well controlled hypothyroidism * Metabolic disorders of importance for weight control - to be discussed * Treatment for depression and other psychiatric disorders during the last 6 months before inclusion * Pharmacological treatment of importance for weight control * Hypothalamic or monogenic obesity, e.g. syndromes and Mb Down * Severe neuropsychiatric disorders that could affect study compliance * Eating disorders requiring therapy during the last six months before inclusion or observed at the inclusion screening.