This app is an interactive eBook that includes the advanced grammatical rules of nouns with special grammatical cases, such as the distinction, the followers, the five nouns, the diptotes, the minimized nouns,  the nouns of verbs, and much more. It also includes a summary of all the rules with examples and comprehensive texts.
It contains high-quality mp3 files and other tools that will make the self-learning process easy and fast.
It also includes a printable version of the workbook [pdf file], which contains a lot of important exercises (with their answers).