تفسير الألوسي is a free Android app developed by So Smart Apps that offers a comprehensive interpretation of the Quran. The app's main feature is its powerful search function, which allows users to search for any word or phrase within the Quran's verses or interpretation. It also provides the ability to search within a specific surah or a selected group of surahs.

The app offers eight different Arabic fonts and the ability to change the font size and color to suit individual preferences. It also allows users to choose from hundreds of background colors and images to enhance their reading experience.

تفسير الألوسي provides a list of the blessed surahs and their respective verses, making it easy to navigate. It also provides a side menu that displays all the verses within a surah for quick access. Additionally, users can mark their favorite surahs and verses and add personal notes and reflections.

Users can also customize the app's settings, including language preference, line spacing, and automatic scrolling. The app also features a timer function that allows users to set a specific reading time and exit the app automatically.

Overall, تفسير الألوسي is a user-friendly app that provides a comprehensive interpretation of the Quran with powerful search and customization features.