Diji Optik is a free education and reference application developed by KULYAY YAYINCILIK ANONIM SIRKETI for the Android platform. This app is designed to read optical forms compatible with the application. It offers two options: student and teacher.

For students, Diji Optik allows them to read optical forms and instantly view their correct, incorrect, blank answers, and score. The app also enables them to save their results in PDF format.

For teachers, this app allows them to read optical forms and instantly view their students' correct, incorrect, blank answers, and score. The app also enables them to save the results in a ranked list and in PDF format. Teachers can set the highest score and the number of correct and incorrect answers to determine the ranking.

To avoid the "TEST BULUNAMADI" error message, users need to update the application by clicking the "Güncelle" button and waiting for the update screen to close. For PDF results, users are advised to install the Acrobat Reader application on their smart devices. Once the PDF is opened, they can click the menu button and select "Download."

Overall, Diji Optik is a convenient and useful application for students and teachers who need to read optical forms and view the results instantly.