Self-Management Using Smartphone Application for Type2 DM in Real siTuation (SMART-DM)

Inclusion Criteria: * Type 2 DM using oral hypoglycemic agent * 6.5% \< HbA1c \< 10% * systolic blood pressure \> 130 mmHg or diastolic blood pressure \> 80 mmHg * BMI over 23.0 * 20 \< age \< 70 * smartphone user (android OS based) Exclusion Criteria: * Serum fasting glucose \> 250 mg/L or post prandial 2 hour serum glucose \> 350 mg/L * systolic blood pressure \> 180 mmHg or diastolic blood pressure \> 110 mmHg * Diabetes mellitus patient using insulin * severe chronic diabetic complications (diabetic foot ulcer, severe diabetic retinopathy, diabetic nephropathy with severe proteinuria) * congestive heart failure (NYHA III-IV or left ventricular ejection fraction \< 30%) * Aspartate aminotransferase (AST) or alanine transaminase (ALT) over 3 times of upper normal limit * Serum creatinine \> 1.5 mg/dL * refusal to participate in the study * drug addiction or alcohol addiction * major psychiatric illness * steroid treatment or hormonal treatment with changing the drug or drug dosage in 1 month * changing dosage of antihypertensive agent, oral hypoglycemic agent or lipid lowering agent in 1 month * malignant cancer * pregnancy