So Smart Apps has developed a free Android application, إكمال المعلم شرح صحيح مسلم, which is a comprehensive guide to the Sahih Muslim book. The app is a detailed explanation of the Sahih Muslim book, authored by Abu Al-Fadl Ayad bin Musa bin Ayad bin Amrun Al-Yahsabi Al-Sabti, who passed away in 544 AH. The book contains a detailed explanation of the Muslim faith through the Hadith of Prophet Muhammad.

The app's main features include customizable fonts, colors, and backgrounds. Users can choose from eight Arabic fonts and hundreds of background colors and themes. The app also has a night mode for comfortable reading and a side menu with all chapters for easy navigation. In addition, users can save their favorite chapters, take notes, and share them with others. The app also has a search function that allows users to search for specific words or phrases within the book. Overall, إكمال المعلم شرح صحيح مسلم is a must-have app for anyone looking to learn more about the Muslim faith.