The التاج والإكليل لمختصر خليل app by So Smart Apps is an Arabic book that provides readers with a comprehensive summary of the famous book "Mukhtasar Khalil." The app offers a variety of features such as the ability to change the font size, color, and style of the text in eight different Arabic fonts. Additionally, users can choose from hundreds of background colors, dozens of themes, and even select their own images for the background.

The app also features a side menu with all the chapters for easy navigation, as well as arrows at the end of each chapter to easily move to the next or previous chapter. Users can adjust the line spacing and alignment of the text and even choose to read in full screen or normal mode. The app allows readers to easily search for any word within the text, save their favorite chapters, and even share selected text with friends. Overall, the التاج والإكليل لمختصر خليل app is a useful tool for those looking to read and study the Mukhtasar Khalil book in Arabic with many helpful features to enhance the reading experience.