- Read DRM-free and password-free EPUB books in three book styles: Classic Book, Modern Book, and Modern Scroll
- Choose or create favorite themes with over 30 built-in day and night themes and Theme Editor
- Enhance book page layout with user's override over font, text layout control, page layout control, paragraph numbering, and more
- Look up words, translate sentences, mark pages, speak text, and mark text with notes
- Navigate across pages conveniently in multiple ways with anchor button, two-level page slider, fast full-text search, and more
- Gesture control some common actions
- Import favorite fonts
- Read EPUB 3.0 books designed for vertical-writing and right-to-left languages
- Present the subset of browsable books using the bottom toolbar with four presentation styles and 13 sorting orders
- Choose the subset of browsable books using the top toolbar with a combination of (subject) tags, (book) sets, and keyword search (title, author, or series)
- Manage book sets with tools that give user-defined book sets and more
- Manage tags with tools including the tag pool and more
- Modify individual book attributes (metadata or book info) including its cover image
- Enjoy a beautiful bookshelf in portrait or landscape orientation with built-in bookshelf background scenes, Scene Editor, and more
- Exchange books and metadata in a multi-tabbed view where users can get their books in and out in many different ways
- Download from external book sources with built-in links to OPDS catalogs and HTML webpages, user-defined links, smart batch download, calibre support, Dropbox support, and more
- Transfer files via USB from and to a PC with iTunes View
- Keep track of files transferred from Websites or iTunes with Queue View
- Import multiple files at a time from a PC via Wi-Fi with PC Upload View
- Mark notes that are overlappable and assigned with one of five levels of priority that are distinguishable independent of highlight colors of themes
- Edit a single note in Note Editor
- Manage multiple notes in Note List View and its companion, Library Notes View with user-defined note lists to keep track of different kinds of notes that can be exported and shared
- Import a note file automatically as a new note list so as not to mingle with existing notes
- Search notes by quotation or comment.