Class Notes BD has developed an educational app called "কলস ৫ গনত সমধন - Class 5 Math Solution Bangla" for Android devices. This app is designed to provide students with a comprehensive learning tool for mathematics. The app covers all the chapters of Class 5 mathematics in the Bangla language.

The app is user-friendly and easy to navigate, allowing students to access all the chapters and math solutions quickly. The app includes other guides as well, such as English, Bangla, Science, Islam, and moral education, Bangladesh and global guide, Hinduism, Buddhism, and Christianity. The app is a full version and is free for all users.

Overall, "কলস ৫ গনত সমধন - Class 5 Math Solution Bangla" is a must-have app for Class 5 students. It offers a comprehensive learning experience for students, making it easier for them to understand math concepts and solve math problems.