Quill vs Ghostreader AI

Quill is an ebook reader with built-in AI that helps you understand what you read. Import your EPUB and PDF books, then tap any word or passage to get instant definitions, translations, and contextual explanations

Ghostreader is the e-reader that reads with you. Bring books, papers, and articles into one private reading workspace, then ask questions, follow ideas, and return every answer to its source. READ WITH GHOST • Ask questions grounded in the text in front of you • Highlight a passage to explain it, define it, or ask a follow-up • Chat with one book, a selected set, or your whole library • Check cited source passages instead of taking an answer on faith • Listen with natural read-aloud while the page stays visible KEEP A PRIVATE READING MEMORY • Turn saved highlights, notes, and page-linked questions into inspectable ideas • See meaningful connections across books without turning reading progress into a public profile • Search what you kept and review a human-readable activity history BUILD IN BOOK STUDIO • Create cited comparisons, evidence tables, literature reviews, outlines, maps, briefs, and reading plans • Let Ghostreader find relevant passages automatically, or pin the exact passages you want • Revise artifacts without losing their source snapshot or version history READ WITH FRIENDS • Share one sourced page, note, or question with people you choose • Catch up through a finite Today table instead of an endless ranked feed • Read together in invite-only rooms with quiet, qualitative signals • Reply by branching from a passage in your own copy Friends is optional. Your library, private highlights, reading position, Reading Memory, and Studio work are not shared by default. You confirm the audience for every shared page. BRING YOUR OWN READING Import EPUB books, PDFs, Markdown files, research papers, and web articles. Switch supported originals between paged and continuous reading, and keep downloaded EPUB or PDF originals available for offline reading and search. AI explanations, sync, and newly generated work require a connection. Ghostreader includes a free Normie Reader plan with up to three new reading materials per month. Avid Reader is $6.99 per month and removes the monthly import limit. AI reading features are included on both plans. An account is required. Your library is private and is not used to train public AI models. Privacy Policy: https://ghostreader.ai/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/