ООП в Python 3.x is a free educational app for Android users in the Education & Reference category. The app is a continuation of the educational series "Game Programming, Creating from Scratch (Python 3)". The app's main focus is on the basics and principles of developing programs using object-oriented programming in Python 3.x. The app is designed for those who want to learn how to develop programs in the object-oriented programming paradigm. It provides an overview of the architecture and principles of game algorithms, working with graphics in pygame, sound, and keyboard and mouse actions.

The app provides a detailed description of ideas and implementations, practical examples, and results. It offers large code listings that users can download and try on their computers. The app guarantees the functionality of programs on Python version 3.7 or higher. However, the author strongly recommends using a personal computer if possible. The app is ideal for those interested in game development, and it is recommended for users aged 13 and above.