مشكل إعراب القرآن الكريم, developed by So Smart Apps, is a free educational app available on Android. The app is a comprehensive reference tool that allows users to search the entire Quran using any word in the verses or commentary. The app also includes a search section within each individual Surah, as well as within a user-specified number of Surahs. Users can search for specific verses and view their interpretation separately.

The app includes eight different Arabic fonts and allows users to adjust font size and color. It also includes hundreds of background color options and the ability to set custom backgrounds for comfortable reading. The app also features a list of the names of blessed Surahs, separate lists of verses for each Surah, and a side menu for quick navigation between verses. Users can mark their favorite Surahs and verses, take notes, and share verses or specific parts of verses with others. With the app's timer feature, users can set a time for reading and the app will automatically stop after the specified time. The app is available in ten different languages.