Inclusion Criteria:  Minor patient of 11 years of age or older Overweight or obese patient respectively defined as a BMI ≥ IOTF 25 and ≥ IOTF 30 Mild intellectual disability defined as intelligence quotient (IQ) ≥ 55 and <70 or (if IQ unknown) patient in a special education institution (ULIS, IM-PRO) Affiliated or beneficiary of a social security scheme Written consent of the patient and one of the parental authority holder  Exclusion Criteria:  Patient with a severe autistic disorder Patient who already used the Chalaxie tool during his/her follow-up Difficulties in understanding the instructions for using the software and/or difficulties in using a computer