Comparison

GlossBook vs EPUB Reader

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

Head to head
About

GlossBook

Features
Read full description

GlossBook helps you read foreign-language books without breaking your flow. Point your camera at a printed page, tap a word, and get a clear translation that uses the surrounding sentence for context. Instead of stopping to type words into a dictionary, you stay with the book and keep reading. GlossBook is built for readers, language learners, and anyone trying to enjoy printed books in another language. Features: - Context-aware translations based on the surrounding sentence - Phrase detection for more natural results than word-by-word lookup - Tap any recognized word on a printed page to translate it - Camera-based text recognition — no typing required - Translation history stored on your device and organized by book - Export saved words to Anki or Quizlet for spaced-repetition study - Copy translations for notes or study - Choose your translation language - On-device offline translation for supported downloaded language pairs - No account required GlossBook is not a full-page translator. It is designed for the way people actually read: one unfamiliar word or phrase at a time, without losing the thread of the story. GlossBook includes a limited allowance of context-aware online translations. An optional GlossBook Pro auto-renewable subscription, available monthly or yearly, provides continued access to context-aware translations. You can continue using supported on-device translation without subscribing. Your privacy: Camera images stay on your device and are never uploaded. For a context-aware online translation, GlossBook sends only the tapped word, its surrounding sentence, and your chosen translation language. On-device offline translations do not send this text to GlossBook's server. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

EPUB Reader

This app helps you learn languages by reading books with side-by-side translations. You can tap to translate words or sentences, save vocabulary, and customize your reading experience. It offers a selection of free classic reads and the option to import your own EPUB and TXT files.

Highlights
  • Dual-text translation
  • Tap to translate words/sentences
  • Save vocabulary with context
  • Import EPUB and TXT files
  • Customizable reading themes and fonts
  • Offline translation after initial download
Features
Read full description

Duotext translates whole sentences while you read. Keep the original in view and reveal a sentence’s translation with a tap, or keep translations visible with Pro. Read on iPhone and iPad. 24 CLASSIC READS IN YOUR LIBRARY • Three complete starter texts, free to read. • The English language setting starts with three French fables by Jean de La Fontaine, with ready-to-read English translations. • Other language settings start with English stories by Kate Chopin, O. Henry and Oscar Wilde. • Twenty-one more texts with Pro: French stories by Maupassant and fables by La Fontaine for the English language setting; English stories, including stories by Saki, for other settings. TRANSLATION THE WAY YOU WANT IT • Tap to translate — free, in every book: touch the mark after a sentence and its translation appears • Always-on translation under the text, with no tapping at all — with Pro • Choose how the text is split: by line, by sentence, or by paragraph — with Pro • Tap a single word to see what it means in that exact sentence BUILD VOCABULARY FROM REAL BOOKS • Press and hold a sentence to save a word together with the context you met it in • Free: up to 20 saved words. Pro: an unlimited dictionary BRING YOUR OWN BOOKS — WITH PRO • Import EPUB and TXT files • Paste any text • Save an article from the web by link A READER FIRST • Six reading themes, serif, sans serif and rounded fonts, adjustable type size — all free • Covers, reading progress, and your place in the book • Your books stay on your device HOW TRANSLATION WORKS Duotext uses the translation built into iOS, so text is translated on your iPhone. The first time you use a language pair, iOS downloads that language model, which needs an internet connection; after that, translation runs on your device. You can translate into the languages your device supports for translation. No account, no sign-up. WHAT IS FREE AND WHAT IS PRO Free: 3 complete stories, tap to translate in any book, up to 20 saved words, and every theme, font and type size. Duotext Pro adds: 21 more stories, always-on translation under every line, the by line / by sentence / by paragraph layouts, importing your own EPUB and TXT files, pasted text and links, and an unlimited dictionary. SUBSCRIPTION AND PURCHASE Duotext Pro is available as a yearly subscription with a free trial, or as a one-time Lifetime purchase. • Payment is charged to your Apple Account at confirmation of purchase. • The subscription renews automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours before the end of the current period. • You can manage your subscription and turn off auto-renewal in your Apple Account settings. • Any unused portion of a free trial period is forfeited when you purchase a subscription. • Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy Policy: https://artsaverin-star.github.io/legal/duotext/privacy.html

Screenshots

GlossBook4 screens
EPUB Reader4 screens

Verdict

The call

The clearest difference is update cadence: EPUB Reader at every 3 days against GlossBook's weekly. On price, ads, in-app purchases and device support 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. GlossBook sells 2 in-app purchases, starting at $3.99 per month and EPUB Reader sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

GlossBook ships an update weekly, EPUB Reader every 3 days. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard1 real difference · 9 level
GlossBook versus EPUB Reader: the parameters behind the verdict, then further details
ParameterGlossBookEPUB Reader
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.618.0 — better
Further details — not scored
Size107 MB35 MB
Age rating4+12+
DeveloperEvgenii ShlikhotaIaroslav Saverin

In-app purchases

2 purchases

GlossBook

Subscriptions2
  • Monthly$3.991 Month
  • Yearly$29.991 Year
3 purchases

EPUB Reader

Subscriptions2
  • Monthly$1.991 Month
  • Yearly3 Days trial$13.991 Year
One-time1
  • Lifetime$39.99

Questions

Is GlossBook free?
GlossBook is free to download, with in-app purchases available.
Is EPUB Reader free?
EPUB Reader is free to download, with in-app purchases available.
Do GlossBook or EPUB Reader have ads?
Neither GlossBook nor EPUB Reader shows ads.
Which is updated more often, GlossBook or EPUB Reader?
GlossBook ships an update weekly, and EPUB Reader every 3 days. Most recently, GlossBook was updated on October 24, 2026 and EPUB Reader on October 29, 2026.

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