GlossBook vs Readum
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
GlossBook
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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 โ 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/
Readum
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Read books in another language and grow your vocabulary as you go. Readum brings together an ebook reader, contextual translations, and flashcards for review. Select an unfamiliar word, see its meaning based on the sentence, and save it to your personal dictionary. Later, reinforce new vocabulary with spaced repetition. Readum features: โข 184 languages available for creating language pairs; โข import your own books in EPUB format; โข free classics from the Project Gutenberg catalog; โข AI-powered translations of words and sentences; โข save words together with their original context; โข listen to word pronunciation; โข flashcards for regular review; โข separate dictionaries for different language pairs; โข learning statistics and flexible reading settings. Read what interests you. Unfamiliar words will gradually become familiar. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://readus.app/privacy-policy
Screenshots
Verdict
GlossBook and Readum are too close to call on the numbers: across 6 compared parameters โ price, update cadence, ads and in-app purchases among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. GlossBook sells 2 in-app purchases, starting at $3.99 per month and Readum sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
GlossBook ships an update weekly, Readum fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | GlossBook | Readum |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly โ better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad โ better | iPhone |
| Requires iOS | 18.6 | 17 โ better |
| Further details โ not scored | ||
| Size | 107 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | Evgenii Shlikhota | libersave.com GmbH |
In-app purchases
GlossBook
- Monthly$3.991 Month
- Yearly$29.991 Year
Readum
- Monthly Subscription$5.991 Month
- Annual Subscription$44.991 Year






