For those wanting to sample more of the manga goods beyond just the most current chapter, you'll have to become a premium member. (anime.astronerdboy.com)
You can tap at the bottom center of the screen to reveal current chapter info, and a slider for moving around within a book. (computerworld.com)
One does NOT need to be a member of Crunchyroll in order to read the most current chapter of their simulpub titles. (anime.astronerdboy.com)