Follow-up of the patients in the control group continued in the outpatient clinic.

This application includes an interface where patients can enter drug treatment information such as INR values, disease diagnosis, how many times a day and how many mg they take, and a chat box section where they can communicate with their physicians, including emergencies. The doctor reviewed the patient's INR findings once they were relayed by the patient, then told them to adjust the patient's warfarin dosage and schedule the next INR check. The application sent notifications to the patients every day about when and how many mg of the drug they would take

The relevant software company assisted in developing the phone application. The language of the application created with the name "Set My INR" is Turkish. The application provided an opportunity for patients to share and communicate with their physician after having the INR value measured in a health institution near their place of residence before coming to the hospital

To measure the knowledge level with "Patient Information Form" of patients using coumadin about the medication.

Measuring medication compliance with "The Adherence to Refills and Medications Scale" of patients using coumadin.

To compare the INR values of the patients using the phone application and followed face to face.