The program titled 'ক বড় কষতগরসত ইসলমক বই' is an educational application available on the Android platform. It offers users access to the PDF version of the book 'Who is the big loser' by Abdur Razzak bin Yusuf. This work aims to provide valuable insights and knowledge to the Muslim community, making it a significant resource for those interested in religious literature. The application is free to download and use, ensuring accessibility to a wide audience.

In addition to the book itself, the application encourages user interaction through comments and ratings, fostering a community of readers who can share their thoughts and feedback. This feature not only enhances the user experience but also motivates the developers to publish more educational content in the future. Overall, this program serves as a beneficial tool for individuals seeking to deepen their understanding of Islamic teachings.