Seeing the words smoothly synchronized with speech improves comprehension and knowledge retention. Auto-scrolling and full-screen, distraction-free view helps the reader focus. Sleeper timer. Repeats. Word-by-word and sentence by sentence reading. Speed reading. Change voice, speed, pitch, pause duration. Custom pronunciation dictionary. Skip margin text and citations. Change font, font size, colors, line and character spacing, and margins. Organize documents and books in folders. Search, filter and sort. Reading list. ...