Three percent of the population suffers from psychotic disorders, which are an important cause of disability in adolescents and young adults. In order to adapt the medical follow-up and to avoid a worsening of the disorder, it is essential to closely monitor the evolution of psychotic symptoms, both in terms of frequency and intensity. Today, this is done through follow-up interviews every three months. However, these interviews must be carried out by trained professionals, last two hours and are not necessarily accessible to everyone. This is why a team from the University of Geneva (UNIGE) has developed an application that makes it possible to monitor the evolution of the symptoms of a person at risk for psychosis on a daily basis. This “remote” monitoring would make it possible to space out face-to-face sessions and make them necessary only when the person is going through a crisis phase or an exacerbation of symptoms. In addition, it will be possible for psychologists to determine what causes the appearance of symptoms in the person’s daily life. These results can be read in the journal Schizophrenia Research.