The Mobile Diabetes Mgmt. Study With Type 2 Diabetes

Inclusion Criteria: * 20-80 years of age * Type 2 diabetes patients (who have taken stably oral diabetic drugs or insulin, and been doing lifestyle improvement by doctor's advice for recent over 3 months) * in case insulin treated, patients with basal insulin once a day or premixed insulin twice a day * HbA1c between 7.0% and 10.0% * ability to understand and use smartphone application Exclusion Criteria: * type 1 diabetes or patients using insulin pump * severe complications (stage IV,V chronic kidney failure, diabetic food complications, unstable angina pectoris, MI or stroke, surgical procedure of coronary \& peripheral artery within recent 6 months) * uncontrolled hypertension * pregnant woman, fertile woman who will not use contraception * unable to use application during treatment * taking medication which can affect on glucose level * alcohol abuse or dependency * over 2.5 times from the upper limit of liver enzyme level * DKA(diabetic ketoacidosis) or HHS(Hyperglycemic hyperosmolar syndrome) history during recent 6 months