Inclusion Criteria:  between 18 and 65 years old; 24kg/m^2 ≤ BMI < 37.5kg/m^2; Proficient in using mobile applications; Agree to sign the informed consent  Exclusion Criteria:  secondary obesity (such as hypothyroidism, Cushing's syndrome, hypothalamic obesity or long-term use of obesity-causing drugs, etc.); Patients with chronic diseases that require special diet and affect exercise; Patients suffering from severe liver, kidney or heart dysfunction; Patients with a history of malignant tumor; Pregnant or lactating women; Low level of education or illiteracy; Inability, unwillingness, or refusal to comply with study requirements (including lifestyle adjustments, follow-up, and subject duties)