The goal of this Randomized Controlled Trial is to study the effect of mobile Application on glycemic control of type2 diabetes mellitus. The main questions aim to answer are:

• The effect of mobile application on glycemic control and quality of life of diabetes mellitus patients
• The satisfaction of mobile application of diabetes mellitus patients who used it Participants will be received education about diabetes mellitus and separated into two groups, intervention group(using mobile application) and control group(not using mobile application but also receive standard treatment of diabetes mellitus.

Researchers will compare intervention group to control group about glycemic control including HbA1c, complications of diabetes mellitus etc. and quality of life.

Inclusion Criteria:

• Type2 diabetes mellitus who have HbA1c above 7%
• Can use application on smartphone
• age 18 years old or more (relatives are accept if participants have age more than 65 years old and cannot use smartphone)
• consent to participate the research

Exclusion Criteria:

• refuse to participate the research
• pregnancy
• using continuous glucose monitoring system or insulin pump
• disability in sight or hearing
• have been using the mobile application(RAMAdiabetes) in the past