OOP Pocket is an application developed for student Diploma Digital Technology Polytechnic Malaysia. This application can make student easily remember and understand the main concept of object oriented programming. As a pocket note to the student, they can make self-study and help the beginner who want to learn the basic oriented programming using java language. The application also design with a simple notes, real-world example and syntax will surely helpful to the student. Students who are wanting an accessible reference on OOP easily bring anywhere this OOP Pocket because had stored in their own smartphone.