So Smart Apps' مكتبة الآجرومية في النحو is a free Android application that offers a vast collection of Arabic grammar books, including متن الآجرومية لابن آجُرُّوم and كتاب متممة الأجرومية لشمس الدين الطرابلسي. The app allows users to change font size, color, and style, with eight Arabic fonts to choose from. It also offers a wide range of background colors and themes, with dozens of preset images to choose from. The app's page display feature includes a full-screen mode and a night-reading mode, with a sidebar menu for easy navigation between chapters and arrows for easy movement between pages. Users can also copy and share text, search within chapters, and save their favorite chapters. مكتبة الآجرومية في النحو also includes an automatic scrolling feature and a timer to set reading time.