Comparison

iLib vs Duo Reader

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

Head to head
About

iLib

Features
Read full description

iLib is your pocket library — one beautiful app for everything you read, hear, and study. Read on the web, on your iPhone and iPad, and on macOS — with more platforms on the way; sign in and your library, reading progress, notes and vocabulary sync across every device. ONE LIBRARY FOR EVERYTHING Books, comics, web novels, audiobooks, podcasts, radio and news — all in one place. Stream a massive global catalog of podcasts and live radio stations from countries and languages around the world, follow world news as it happens, and discover millions of free titles from public catalogs — or bring your own files. OPENS ALMOST ANYTHING • E-books: EPUB, MOBI, AZW, AZW3, FB2, FBZ • Documents: PDF • Text: TXT, Markdown • Comics: CBZ, CBR, CB7 • Audiobooks: MP3, M4A, M4B, AAC, OGG, OPUS, FLAC, WAV — with chapters and cover art And with Send to iLib, paste any web article and it becomes a clean, readable book in your library. A SERIOUS READER A fast, beautiful reader with full typography control, highlights, notes, bookmarks and a calm dark mode. Open two books side by side — each keeps its own position, settings and translation — and read right-to-left and vertical scripts with ease. LISTENING IS READING TOO Sentence-level text-to-speech with synced highlighting, plus audiobooks, podcasts and read-along. Keep going with your ears when your eyes need a break. LUMI, YOUR AI READING PARTNER Ask questions about the book you're reading, get hard passages explained, and summarize chapters — grounded in the text in front of you. Use on-device models or bring your own key. TRANSLATE ANYTHING Translate a word, a passage, or an entire book across multiple engines — with optional, higher-quality AI translation when you want it. The interface itself is localized in 33 languages. EXPORT AND TAKE YOUR BOOKS WITH YOU Export any book as the original file, a fully translated edition, or a bilingual side-by-side EPUB — generated right on your device. LEARN AS YOU READ Tap any word to look it up, build your vocabulary, and review with spaced repetition and leveled reading. Import your existing word lists. YOURS, AND PRIVATE Local-first and offline-ready — your library lives on your device. Sign in to sync across every device. Your third-party credentials are end-to-end encrypted. No ads, no tracking. Start reading at web.ilib.ai or right here on your iPhone and iPad.

About

Duo Reader

Features
Read full description

Duo Reader is a quiet place to read. Your books, PDFs and articles live in one calm library, set in beautiful type, with a reading companion for when a page needs a second look. READ IN COMFORT - Typography first: choose your typeface, size, spacing and margins, and every line reflows instantly - Clean, distraction-free pages that let the words lead - Pick up exactly where you left off, every time YOUR LIBRARY, QUIETLY ORGANIZED - Books, PDFs and RSS articles in one place - Folders for studying, classics, or whatever you're reading next - Search across your books and jump straight to the passage UNDERSTAND WHAT YOU READ - Select any passage to explain, define, highlight or add a note - Translate a passage and read it alongside the original - Ask Mochi, your reading companion, to summarize a chapter without leaving the page LISTEN WHEN YOUR EYES NEED A REST - Natural voices in several languages, with adjustable speed - Follow along as each sentence is highlighted EVERYTHING YOU SAVE, IN ONE PLACE Bookmarks, notes and highlights, gathered and easy to revisit. EVEN BETTER ON IPHONE DUO Unfold iPhone Duo and your page opens into a true two-page spread. Translations, Mochi and your notes sit beside the page instead of on top of it. Fold it again mid-chapter, or mid-sentence while listening, and you're still on the same line. PRIVATE BY DESIGN Mochi answers quick questions on device, so your reading stays on your iPhone. Mochi features require a device that supports Apple Intelligence. --------------------- Privacy Policy: https://leostudio.global/policies Terms of Use: https://leostudio.global/policies For technical assistance or other inquiries: support@leostudio.global

Screenshots

iLib4 screens
Duo Reader4 screens

Verdict

The call

The clearest difference is ads: iLib at none against Duo Reader's shown. iLib also leads on device support (4 vs 2) and iOS requirement (14.0 vs 17.6). Duo Reader's advantage is update cadence (every 6 days vs fortnightly). On price 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

iLib ships an update fortnightly, Duo Reader every 6 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
iLib versus Duo Reader: the parameters behind the verdict, then further details
ParameteriLibDuo Reader
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyFortnightlyEvery 6 days — better
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS14.0 — better17.6
Further details — not scored
Size60 MB95 MB
Age rating17+4+
DeveloperQianye (hubei Province) Education Technology Co., LtdLeoStudio Global

In-app purchases

None

iLib

No in-app purchases

None

Duo Reader

No in-app purchases

Questions

Is iLib free?
iLib is free to download, with no in-app purchases.
Is Duo Reader free?
Duo Reader is free to download, with no in-app purchases.
Do iLib or Duo Reader have ads?
Duo Reader shows ads; iLib does not.
Which is updated more often, iLib or Duo Reader?
iLib ships an update fortnightly, and Duo Reader every 6 days. Most recently, iLib was updated on October 25, 2026 and Duo Reader on October 31, 2026.

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