30 পরকষত মনতর বই is a free Android application developed by Goonsoft under the Education & Reference category. This app offers a comprehensive collection of more than 30 tested mantras that are not easily available in other books. The app is designed to provide users with the convenience of accessing these mantras from one place without the need to carry multiple books.

The app offers mantras from different categories, including Vashikaran, Kabiraji, and Tantra. Users can easily navigate through the different categories and access the mantras they need. The app is user-friendly and easy to use, making it suitable for all age groups. However, the app does not offer any additional features like audio or video tutorials, and it lacks a search function to find specific mantras quickly.