The السنن الكبير للبيهقي app developed by So Smart Apps is an excellent Islamic reference tool for Android users. This free educational app falls under the Books category and provides users with an extensive search feature, allowing them to search the entire book or individual chapters. The app also provides various options related to fonts, colors, and backgrounds, making it easy for users to customize their reading experience.

The app includes a comprehensive menu with the main sections of the book, chapters of each book, and a quick-access menu for easy navigation. Users can also create bookmarks and notes related to each chapter. Additionally, the app allows users to copy and share any chapter or specific text within a chapter. Overall, the السنن الكبير للبيهقي app is an excellent tool for anyone looking for a comprehensive Islamic reference on their mobile device.