App and Body Fat Scale in the Management of Overweight Patients

Inclusion Criteria: * Age 18-60 years old, no gender restriction. * According to ICD-10 to diagnose bipolar disorder or schizophrenia, the researcher judges that the patient is currently in remission, or the condition is stable and can cooperate with the research. * Currently using at least one antipsychotic or mood stabilizer (e.g. lithium, magnesium valproate, sodium valproate, lamotrigine). * Currently overweight or obese (body mass index ≥ 24kg/m2) and willing to use health app and smart scales to lose weight. * The education level of primary school or above, able to understand the content of the scale, and be able to use smart phone proficiently. * Understand and voluntarily participate in this study, and sign the informed consent form. Exclusion Criteria: * Plan to lose weight by other methods during the study period (such as dieting, inducing vomiting, taking diet pills, surgery). * Self-reported weight loss ≥ 7% in the past 6 months. * Weight over 150 kg. * Other secondary obesity (such as hypothyroidism, Cushing's syndrome, hypothalamic obesity, etc.). * Currently pregnant, lactating, \< 6 months postpartum or planning to become pregnant during the study period. * Self-reported cardiac discomfort or chest pain during activity or at rest. * There is a serious medical condition, and the researchers believe that there may be safety risks when participating in sports. * Be unable to walk 30 minutes without stopping. * There are problems that may affect compliance with the protocol (eg, end-stage disease, planning to move travel to the field, history of substance abuse, other uncontrolled or untreated medical conditions); * Any other conditions deemed inappropriate by the investigator. Participants include approximately 50% with schizophrenia and 50% with bipolar disorder, distributed across all clusters.