Polyglot Reader vs Book Translator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polyglot Reader
Read books in foreign languages and learn new vocabulary. Tap on unknown words for instant translations and save them to flashcards for later study. Supports various document formats and offers pronunciation practice and knowledge tests.
- Read books in multiple formats (PDF, EPUB, TXT)
- Translate unknown words and phrases instantly
- Create flashcards for vocabulary learning
- Pronunciation support for words and phrases
- Knowledge tests for vocabulary sets
- Scan and recognize text from documents
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Read books in any foreign language and turn every unknown word into a flashcard you'll actually remember. Now with an account and cloud sync: your books and flashcards go with you to every device. Polyglot Reader is your pocket library, dictionary and flashcard trainer in one app. Tap any word or phrase in a book, get an instant translation with transcription, hear the pronunciation, and save it to a deck to review later. Built for iPhone, iPad and Mac, with a refined dark theme. — ACCOUNT & SYNC — • Sign in with Apple, Google or email • Books, card sets, flashcards and language pairs stay in sync across all your devices • Your own books are uploaded to the cloud together with their covers • New device? Sign in and your library and flashcards come right back — READ — • Completely redesigned reader, bookmarks, translation popup and settings • New System theme that follows iOS automatically, plus refined Light and Dark • Open books in PDF, EPUB, FB2, RTF and TXT • Import from Dropbox, Google Drive, OneDrive or any file app • Scan a paper page — the app recognizes the text and saves it as a book • Highlights words you don't know yet, right inside the page • Vertical scrolling, comfortable type settings, picture zoom — LIBRARY — • Thousands of free books in 38+ languages, sorted into sections like Classics, Sherlock Holmes, Shakespeare, Horror & Mystery, Fairy Tales, Philosophy, Adventure • Adapted A2–B1 readers for German learners, plus original literature in English, French, Spanish, Italian, Russian, Japanese, Chinese, Latin, Greek and many more • New sorting, new sections and search inside every shelf • Filter to show only recent books • Difficulty level and tags shown right on each cover • Drag and drop books between shelves • New "Added manually" section for everything you imported yourself • Smoother search, scroll and sharing on iPad — LEARN — • Redesigned cards and study screens • Ready-made flashcard sets for English, Spanish, Portuguese, Russian, Chinese and Japanese — verbs, nouns and themed categories • Smart virtual decks: All cards, Recent, Unknown — see progress at a glance • Quick preview and actions inside every deck • Pick a default deck for new words you save while reading • Per-card knowledge level with a colored progress bar (red → green as you master each word) • Three study modes: foreign only, foreign + native, native only • Hands-free mode — keep learning without touching the screen • Long-press context menu: mark as known or unknown in one gesture • Optional shuffled order during study • Filter to show only words you haven't learned yet • Pronunciation for both the word and its translation • Knowledge tests for every deck • Export and import cards in CSV — TRANSLATE — • 111 offline dictionaries — no internet, no quota • On-the-fly transcription for all popular languages • Speech-to-text: just say the word, get the translation • Add your own phrases and translations to any deck • Edit translations when you want a better wording • 90+ languages supported, including Arabic, Chinese, Dutch, English, French, German, Greek, Hebrew, Hindi, Italian, Japanese, Korean, Latin, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian, Vietnamese and many more — AND ALSO — • System, Light and Dark themes • Choose Google or Yandex as your online translator • Compact mode on iPhone, expanded card view on iPad • Notifications to bring you back to recent cards Whether you're reading Sherlock Holmes in English, Kafka in German, Don Quixote in Spanish or Dostoevsky in Russian — Polyglot Reader turns reading into vocabulary, one tap at a time. Questions or feedback: support@readandlearnapp.com
Book Translator
Read and translate books in EPUB, PDF, FB2, and TXT formats with integrated AI-powered translation. Turn any book into a bilingual experience by tapping words or phrases for instant translations without leaving the page. Supports offline translation and offers a distraction-free reading interface.
- Import EPUB, PDF, FB2, TXT files
- Tap for instant word translation
- Translate sentences and paragraphs
- AI-powered and offline translation
- Bilingual reading experience
- Distraction-free interface
- Smart book library
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Read and translate books in any language with a powerful EPUB, PDF, FB2 and TXT reader built for seamless translation. Turn any book into a bilingual reading experience. Tap a word, phrase or paragraph and instantly see the translation without leaving the page. No copy-paste, no switching apps — just read and translate books in one place. READ AND TRANSLATE BOOKS • Import EPUB, PDF, FB2 and TXT files • Tap any word for instant translation • Translate sentences and paragraphs while reading • Stay focused on the story without interruptions AI AND OFFLINE TRANSLATION • AI-powered translation for better context and accuracy • Automatic translation in 59 languages; Premium offline packs keep it going without internet • Translate books anywhere — at home or on the go BILINGUAL READING AND LEARNING • Read books in foreign languages with ease • Translate while reading and build vocabulary naturally • Learn from real context, not isolated phrases A READER BUILT FOR TRANSLATION • Clean, distraction-free interface • Light and dark modes • Adjustable fonts and reading settings • Reading progress saved automatically SMART BOOK LIBRARY • Organize your books in one place • Track reading progress • Quickly continue where you left off Start reading and translating books today. Terms of Use (EULA): https://sites.google.com/view/booktranslator/terms-of-service Privacy Policy: https://sites.google.com/view/booktranslator/privacy-policy
Screenshots
Verdict
The clearest difference is rating: Book Translator at 4.9 against Polyglot Reader's 4.4. Book Translator also leads on ads (none vs shown) and review sentiment (86% vs 66%). Polyglot Reader's advantage is ratings volume (74 vs 12). On price, in-app purchases, monetization model 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
Both are free to download. Polyglot Reader sells 11 in-app purchases, starting at $3.99 per month and Book Translator sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Book Translator holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Polyglot Reader has 74 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 66% of Polyglot Reader's written reviews are positive against 86% of Book Translator's.
Polyglot Reader ships an update every 5 weeks, Book Translator every 10 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Polyglot Reader | Book Translator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (74 ratings) | 4.9 (12 ratings) — better |
| Positive reviews | 65.7% of reviews | 85.7% of reviews — better |
| Number of ratings | 74 — better | 12 |
| Update frequency | Every 5 weeks | Every 10 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 137 MB | 103 MB |
| Age rating | 4+ | 12+ |
| Developer | Anton Ivanov | Mykyta Romanenko |
Customer experience
Polyglot Reader
Book Translator
In-app purchases
Polyglot Reader
- Monthly subscription$3.991 Month
- Monthly subscription3 Days trial$7.991 Month
- Monthly subscription$7.991 Month
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- Monthly subscription$9.991 Month
- Annual subscription$22.991 Year
- Annual subscription$34.991 Year
- Annual subscription7 Days trial$39.991 Year
- Annual subscription$59.991 Year
- Upgrade from advanced to professional version$3.99
- Upgrade from Starter to Advanced version$15.99
- Full version$99.99
Book Translator
- Premium Monthly$2.991 Month
- Premium Yearly$24.991 Year
Questions
Is Polyglot Reader free?
Is Book Translator free?
Which has better reviews, Polyglot Reader or Book Translator?
Do Polyglot Reader or Book Translator have ads?
Which is updated more often, Polyglot Reader or Book Translator?
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