Inclusion Criteria:  Adolescente patient (between 10 and 18 years old) Wearing a brace for less than 3 months The patient has a mobile phone with Android or iOS operating systems The patients has the physical ability to use the application The patient does not present psychological and or cognitive alterations/ problems with language that make their participation difficult The patient (or the legal tutor) voluntarily wants to participate and sings the informed consent  Exclusion Criteria:  The patient does not have an own mobile phone or has a mobile phone with uncompatible characteristics Cognitive alterations, lenguage problems to understand the use of the app and to respond its questions The patient presents a severe mental health issues or substance abuse.