K12Online Classroom is an advanced learning management system developed by Viettel Business Solutions Corporation. It is a part of the K12Online online learning and testing management system, designed to create smart classrooms. The application is available for Android platforms and is free to download and use.

The app offers a comprehensive set of features that are useful for both teachers and students. Teachers can create and manage virtual classes, assign tasks, and track student progress. Students can access course materials, submit assignments, and communicate with teachers. The app also has a built-in video conferencing tool that allows teachers and students to interact in real-time.

Overall, K12Online Classroom is a reliable and user-friendly learning management system that simplifies the teaching and learning process. However, it would be beneficial if the app also had a web-based version to make it accessible to more users.