This is a randomized, open, controlled, single-center trial to identify the weight loss effects of adding mobile health application in obesity multidisciplinary outpatient clinic.

This is a randomized, open, controlled, single-center trial to identify the weight loss effects of adding mobile health application in obesity multidisciplinary outpatient clinic.

The team of obesity multidisciplinary outpatient clinic includes endocrinologists, dietitians, and exercisers. The endocrinologist assesses the patients' conditions, manages the patients, and decides on appropriate medications. Dietitians participate in dietary propaganda and education, and develop personalized diet prescriptions. Exercisers conduct behavior and exercise propaganda, and issue personalized exercise prescriptions. Patients in the experimental group combine m-Health APP with routine obesity clinic management. The m-Health APP could help patients set weight loss targets, record body weights online, learn the calories they consumed in real time, and exercise based on the prescriptions suggested by the exercisers.

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)