Duolingo vs Polyglot Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Duolingo
Learn languages, math, music, and chess through fun, bite-sized lessons. Build vocabulary, grammar, and real-world skills with a science-based methodology. Track progress and stay motivated with a global community.
- Bite-sized language lessons
- Speaking, reading, listening, writing practice
- Math skills development
- Music reading and playing
- Chess strategy and gameplay
- Progress tracking and rewards
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Learn a new language, chess & more with the world's most downloaded education app! Duolingo is the fun, free app for learning 40+ languages through quick, bite-sized lessons. Practice speaking, reading, listening & writing to build your vocabulary & grammar skills. Designed by learning experts & loved by hundreds of millions worldwide, our lessons make learning effective & fun and help you prepare for real conversations in Spanish, French, Japanese, Korean, Chinese, Italian, German, English and more. And now, you can learn CHESS on Duolingo! Whether you're a total beginner or looking to level up your game, you'll love learning chess the Duolingo way. Play matches and fun chess lessons for all levels, no matter the language - chess, ajedrez, xadrez, schach, Шахматы, الشطرنج. • Chess: Learn the moves, level up your game & play matches in our Chess course. Learn the basics, solve fun chess puzzles & improve your strategy with guided lessons. Whether you're new to chess or already play, our course is designed to help you have fun and build real skills. Checkmate! • Math: Forget lectures and math worksheets! Built by learning experts, our Math course makes math feel like a game. Boost learning and fight the summer slide with standards-aligned math lessons for elementary school, middle school, and high school students. • Music: Learn how to read music & play songs in our Music course, no instrument needed! Using an on-screen keyboard, you'll learn bit-by-bit. Whether you're learning a language for travel, school, career or your brain health, you'll love learning with Duolingo. Why Duolingo? • Duolingo is fun & effective. Game-like language lessons & fun characters help you build speaking, reading, listening, & writing skills, plus enjoy fun chess & competitive online chess in one app. • Duolingo works. Designed by learning experts, Duolingo has a science-based teaching methodology proven to foster long-term knowledge retention across language lessons & chess lessons alike. • Track your progress. Work toward your learning goals with playful rewards & achievements when you make practicing language lessons or chess online part of your daily habit. • Join millions of learners. Stay motivated with competitive Leaderboards as you learn languages & play chess online alongside our global community. • Every course is free. Learn Spanish, French, German, Italian, Russian, Portuguese, Turkish, Dutch, Irish, Danish, Swedish, Ukrainian, Esperanto, Polish, Greek, Hungarian, Norwegian, Hebrew, Welsh, Arabic, Latin, Hawaiian, Scottish Gaelic, Vietnamese, Korean, Japanese, English, & even High Valyrian! And now, learn Math, Music & improve your Chess skills with fun, bite-sized lessons. What the world is saying about Duolingo: "Far & away the best language-learning app." - The Wall Street Journal "This free app & website is among the most effective language-learning methods I've tried… lessons come in the form of brief challenges, speaking, translating, answering multiple-choice questions, that keep me coming back for more." - The New York Times "Duolingo may hold the secret to the future of education." - TIME Magazine "Duolingo is cheerful, lighthearted & fun." - Forbes "I Can't Stop Playing Duolingo Chess." - Wired If you like Duolingo, try Super Duolingo for 14 days free! Learn a language fast with no ads & get fun perks like Unlimited Energy & Monthly Streak Repair. If you choose to purchase Super Duolingo, payment will be charged to your Apple account, and your account will be charged for renewal within 24-hours prior to the end of the current period. Auto-renewal may be turned off at any time by going to your settings in the App Store after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://www.duolingo.com/privacy Terms of Service: https://www.duolingo.com/terms
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. Version 5.0 brings a complete redesign — a calmer reader, a smarter library and a new way to study. 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. — 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 classic books in 38+ languages, sorted into sections like Classics, Sherlock Holmes, Shakespeare, Horror & Mystery, Children's Books, 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 to reorganize your 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 tap • 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 • Translate your own phrases and add them 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 default 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 Quijote in Spanish or Dostoevsky in Russian — Polyglot Reader turns reading into vocabulary, one tap at a time. Questions or feedback: support@readandlearnapp.com
Screenshots
Verdict
The clearest difference is update cadence: Duolingo at weekly against Polyglot Reader's every 2 months. Duolingo also leads on ratings volume (5.5M vs 74) and rating (4.7 vs 4.4). On price, review sentiment, 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
Both are free to download. Duolingo sells 16 in-app purchases, starting at $9.99 per month and Polyglot Reader sells 11 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Duolingo holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Duolingo has 5.5M ratings behind it against 74, so its average is the more settled of the two. Written reviews complicate that: 65% of Duolingo's written reviews are positive against 66% of Polyglot Reader's, so the app with the better star average is not the one people write more warmly about.
Duolingo ships an update weekly, Polyglot Reader every 2 months. The most recent releases landed on September 25, 2026 and September 23, 2026 respectively.
| Parameter | Duolingo | Polyglot Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (5.5M ratings) — better | 4.4 (74 ratings) |
| Positive reviews | 64.6% of reviews | 65.7% of reviews — better |
| Number of ratings | 5.5M — better | 74 |
| Update frequency | Weekly — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #1 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 489 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | Duolingo, Inc | Anton Ivanov |
Customer experience
Duolingo
Polyglot Reader
Bugs and requests
Duolingo
Reported bugs
3 issues- Freezing or crashing during lessons
- Incorrect translations or answers marked wrong
- Inconsistent behavior of certain features like leagues
Requested features
5 requests- Add more languages, especially less common ones
- Improve grammar lessons and explanations
- Allow more flexibility in navigating the course content
- Provide better feedback and corrections for mistakes
- Sync progress and features consistently across app and web
Polyglot Reader
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Duolingo
- Super Duolingo7 Days trial$9.991 Month
- Super Duolingo7 Days trial$12.991 Month
- Super Duolingo14 Days trial$12.991 Month
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- Super Duolingo2 variants$59.991 Year
- Super Duolingo14 Days trial2 variants$79.991 Year
- Super Duolingo14 Days trial4 variants$83.991 Year
- Super Duolingo7 Days trial$83.991 Year
- Super Duolingo7 Days trial4 variants$95.991 Year
- Super Duolingo1 Month trial$119.991 Year
- Super Duolingo7 Days trial$119.991 Year
- Chest of Gems$0.99
- Barrel of Gems (1200)$4.99
- Chest of Gems (1200)$4.99
Show 3 moreShow fewer
- Cart of Gems (3000)$9.99
- Barrel of Gems (3000)$9.99
- Cart of Gems (6500)$19.99
Polyglot Reader
- Monthly subscription$3.991 Month
- Monthly subscription3 Days trial$7.991 Month
- Monthly subscription$7.991 Month
Show 5 moreShow fewer
- 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






