IntroductionSevere mental disorders can cause significant and lasting distress for patients and their families and generate high costs through the need for care and loss of productivity. This study tests DIALOG+, an app-based intervention to make routine patient-clinician meetings therapeutically effective. It combines a structured evaluation of patient satisfaction with a solution-focused approach. MethodsWe conducted a qualitative study, based on a controlled clinical trial, in which 9 psychiatrists and 18 patients used DIALOG+ monthly over a six-month period. Semi-structured interviews were used to explore the experiences of participants and analysed in an inductive thematic analysis focusing on the feasibility and effects of the intervention in the Colombian context. ResultsExperiences were grouped into five overall themes: a) impact of the intervention on the consultation and the doctor-patient relationship; b) impact on patients and in promoting change; c) use of the supporting app, and d) adaptability of the intervention to the Colombian healthcare system. ConclusionsDIALOG+ was positively valued by most of the participants. Participants felt that it was beneficial to the routine consultation, improved communication and empowered patients to take a leading role in their care. More work is required to identify the patient groups that most benefit from DIALOG+, and to adjust it, particularly to fit brief consultation times, so that it can be rolled out successfully in the Colombian healthcare system.