Angelucci, Manuela; Fabregas, Raissa; Vazquez, Antonia - 2026
AI-powered mental health apps have attracted growing interest as a low-cost way to expand care. Yet questions remain … mental health by 0.3 standard deviations with no evidence of harm, improved sleep quality, increased healthful behaviors, and … traditional psychotherapy, but this increase does not explain most of the mental health gains. App use was high in the first month …