After the physician involved in the study asks the participants for their biochemical tests (FBC, HbA1C, LDL-C, HDL-C, Total K, Triglyceride), the outpatient dietitian will give routine nutrition education to the participants. In addition, a data collection form including socio-demographic information, health history, nutrition history and height, weight, waist circumference measurements will be made and filled by the thesis student.

The software developed for this research will be downloaded to the phones of the participants in the intervention group. With this software prepared, written and visual information (pictures, mini-videos) will be given to participants every day for 3 months on diabetes, self-management of diabetes and nutrition. Whether the participants read the messages or not will also be monitored through this software. At the end of 3 months, the participants in the intervention and control groups will be invited again, and their biochemical parameters and self-management status will be measured according to the diabetes self-management scale. Data will be collected through face-to-face interviews in the outpatient clinic, and weight will be measured with the bioelectrical impedance analyzer in the outpatient clinic, height will be measured with a height meter fixed to the wall, and waist circumference will be measured with a non-stretchable measuring tape.

With this intervention, the difference between the mobile application supported nutrition diabetes education created with written and visual (video) and face-to-face nutrition and diabetes education will be found.

Type 2 diabetes self-management scores of the participants in the study group and control group will be compared.

For this comparison, the "Type 2 Diabetes Self-Management Scale" consisting of 3 sub-titles (Healthy Lifestyle Behaviors, Blood Sugar Management, Health Services Use) and 19 items developed in 2020 will be applied.

(Scoring: Always 5, Often 4, Sometimes 3, Rarely 2, Never 1 point). Those with higher scores will be considered to show better self-management. This scale will first be administered to the participants when they are diagnosed with type 2 diabetes in the hospital.

Participants will be given diabetes and nutrition education for 3 months, and the Type 2 Diabetes Self-Management Scale will be repeated by inviting them to the hospital for control.

Then, the participants will be taken into a 3-month follow-up process and at the end of the process, they will be invited to the hospital for control and the Type 2 Diabetes Self-Management Scale will be repeated.

The physician participating in the study will measure the Fasting Blood Sugar (mg/dl) values of the participants.

When the participants are diagnosed with type 2 diabetes, their Fasting Blood Sugar (mg/dl) values will be measured and a 3-month diabetes education will be given. At the end of this diabetes training, the participants will be invited to the hospital for control and their Fasting Blood Sugar (mg/dl) values will be measured again.

Then, the participants will be taken to the 3-month follow-up process and at the end of the process, the participants will be invited to the hospital for control and their Fasting Blood Sugar (mg/dl) values will be measured again.

At the end of the research, the effects of mobile application supported diabetes education on fasting blood sugar (mg/dl) will be compared with the routine diabetes education given in the hospital.