المستدرك على الصحيحين - للحاكم is a free Android app developed by So Smart Apps under the Education & Reference Books category. The app features a comprehensive search function that allows users to search the entire book or specific sub-sections. Users can also search for specific chapters. The app provides eight Arabic fonts to choose from and allows users to change the font size and color. Users can select from hundreds of background colors and images for a comfortable reading experience. The app also offers multiple lists, including a list of main sections, individual chapters, and a favorites list. Users can take notes and save them to specific chapters. The app has a timer that allows users to set a reading time and exit automatically. Users can share and copy specific sections of the book by long-pressing on the text. المستدرك على الصحيحين - للحاكم is available in ten different languages.