Write an android magazine/blog app

Need a magazine/blog app where i can manage and publish articles with professional looking. Including images, different typefaces, articles categorized, published in a specific date, writer profile at the bottom of the article, a search option based on the articles categories...etc. Need in app purchase/ subscription feature, as It would be a monthly subscription app. Login for users. A Quiz module where I can manage and add questions/answers with a Ranking system where the users can see their position. Need the users can comment the articles.