Clarify vs Quill
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clarify
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Difficult books are worth reading. Dense prose, unfamiliar ideas, and older language should not keep great books out of reach. Clarify is an AI ebook reader for iPhone and iPad that helps you understand challenging books without leaving the page. Browse 100+ included classics, follow a guided philosophy path, or import your own EPUB. Read the original—not a summary. Ask for help only when you need it, compare clearer wording with the original, and keep reading. AUTO SIMPLIFY AS YOU READ Turn on Simplify and clearer wording appears directly in the reader as you move through the book. Clarify works progressively, paragraph by paragraph, and is designed to preserve the book’s structure and formatting. The original text is always one tap away. SIMPLIFY A PASSAGE Select a difficult sentence or part of a paragraph to see the same idea in clearer language. Switch between the simplified version and the original whenever you want. EXPLAIN THE IDEA Need more than a rewrite? Select a passage for a short answer followed by a fuller explanation informed by nearby text and book context. Understand the idea—not just the words. 100+ CLASSICS—OR YOUR OWN BOOKS Browse and download more than 100 classics across fiction, science, philosophy, history, poetry, adventure, and drama. Already have something you want to understand? Import your own EPUB files and use the same Simplify and Explain tools. GUIDED PHILOSOPHY PATHS Not sure where to begin? Clarify recommends a starting book and related works to explore next: • Understand Stoicism—six essential works featuring Marcus Aurelius, Epictetus, and Seneca • Ethics & the Good Life • Power & Government MADE FOR FOCUSED READING • Reading progress saved automatically • Table of contents and chapter navigation • Adjustable text size • Light, dark, and system themes • Downloaded and imported books stored on your device • Core reading works offline • No account required Stay with the original. Get help when you need it. Keep reading.
Quill
This application enhances your reading experience by providing AI-powered definitions, translations, and contextual explanations for any word or passage within your imported EPUB and PDF books. It offers instant insights to deepen comprehension.
- AI-powered explanations
- Instant definitions
- Contextual understanding
- Import EPUB and PDF
- Word and passage lookup
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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
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Verdict
The clearest difference is update cadence: Quill at every 9 days against Clarify's monthly. Clarify's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Clarify ships an update monthly, Quill every 9 days. The most recent releases landed on September 9, 2026 and July 1, 2026 respectively.
| Parameter | Clarify | Quill |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Davinder Pal Singh | 思涵 岳 |
In-app purchases
Clarify
No in-app purchases
Quill
No in-app purchases





