Comparison

Clarify vs Quill

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Clarify

Features
Read full description

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.

About

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.

Highlights
  • AI-powered explanations
  • Instant definitions
  • Contextual understanding
  • Import EPUB and PDF
  • Word and passage lookup
Features
Read full description

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

Screenshots

Clarify4 screens
Quill4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Clarify ships an update monthly, Quill every 9 days. The most recent releases landed on September 9, 2026 and July 1, 2026 respectively.

Scorecard3 real differences · 6 level
Clarify versus Quill: the parameters behind the verdict, then further details
ParameterClarifyQuill
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyMonthlyEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size41 MB20 MB
Age rating4+4+
DeveloperDavinder Pal Singh思涵 岳

In-app purchases

None

Clarify

No in-app purchases

None

Quill

No in-app purchases

Questions

Is Clarify free?
Clarify is free to download, with no in-app purchases.
Is Quill free?
Quill is free to download, with no in-app purchases.
Do Clarify or Quill have ads?
Neither Clarify nor Quill shows ads.
Which is updated more often, Clarify or Quill?
Clarify ships an update monthly, and Quill every 9 days. Most recently, Clarify was updated on September 9, 2026 and Quill on July 1, 2026.

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