DuoBook.co vs Mirror Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DuoBook.co
Read full descriptionHide full description
DuoBook turns any topic, article, or idea into an interactive bilingual story — so you can read real content in your target language with your native language alongside it. Read news, stories, and content from across the internet in two languages at once. Tap any word for instant translation and vocabulary tracking. Build your reading streak with daily challenges. Free includes: - 1–2 stories per day - Short, medium, and long stories - 5 instant translations per day - Vocabulary tracking - DuoSolve daily word puzzle DuoBook Pro includes: - Unlimited stories - XL-length stories - Unlimited instant translations - PDF export for Kindle - Advanced AI model - Natural human-like voices in 30+ languages - 2 streak freeze per month Subscription automatically renews monthly unless canceled at least 24 hours before the end of the current billing period. Manage and cancel subscriptions anytime in your Apple Account Settings. Privacy Policy: https://duobook.co/privacy Terms of Use: https://duobook.co/terms
Mirror Reader
This app offers a bilingual reading experience with side-by-side translations of real books. It includes features like instant word lookup, vocabulary saving, bookmarks, and audio playback to aid language learners.
- Parallel translations
- Instant word lookup
- Save vocabulary
- Bookmarks and progress tracking
- Audio playback
- Cloud synchronization
Read full descriptionHide full description
Read real books in two languages side by side. Mirror Reader helps you learn languages naturally through real reading. Follow the original text alongside a translation, understand words in context, listen to books, save new vocabulary, and track your reading progress. No forced memorization. No repetitive drills. Just real reading. LANGUAGES Preview books for free in any combination of 80 supported languages, even in guest mode. Premium and Creator unlock full bilingual reading in any combination of these languages: Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Belarusian, Bengali, Bosnian, Bulgarian, Burmese, Catalan, Cantonese, Hokkien/Min Nan, Chinese Simplified, Chinese Traditional, Wu/Shanghainese, Croatian, Czech, Danish, Dutch, Egyptian Arabic, English, Estonian, Filipino, Finnish, French, Georgian, German, Greek, Gujarati, Hausa, Hebrew, Hindi, Hungarian, Icelandic, Igbo, Indonesian, Italian, Japanese, Javanese, Kannada, Korean, Kurdish, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Nepali, Nigerian Pidgin, Norwegian, Odia, Pashto, Persian/Farsi, Polish, Portuguese (Brazil), Portuguese (Portugal), Punjabi (Eastern), Punjabi (Western), Romanian, Russian, Serbian, Slovak, Slovenian, Somali, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, Yoruba, and Zulu. FEATURES • Read books with parallel translations • Combine any supported languages in either direction • Explore a growing library of bilingual books • Look up words instantly and save new vocabulary • Review saved vocabulary with Home Screen and Lock Screen widgets • Add bookmarks and track your reading progress • Listen to any book using your device’s built-in text-to-speech voices • Sign in with your email to synchronize your library, personal texts, and reading progress across devices • Use guest mode without creating an account or entering a password • Delete your account directly inside the app LEARNING ENGLISH When English is the language you are learning, you can: • Practice pronunciation with spoken-word feedback and scoring • Estimate the study time needed to reach your English-learning goal FREE ACCESS Preview books in any combination of 80 supported languages, even in guest mode. PREMIUM Premium unlocks unlimited access to the full cloud catalog and full bilingual reading in any combination of 80 supported languages through a single auto-renewable subscription. CREATOR Creator includes all Premium features and lets you import and prepare your own texts for bilingual reading in any combination of 80 supported languages. Build your vocabulary, improve your comprehension, and enjoy real books in another language—one page at a time. Terms of Use: [https://www.mirrorreader.com/terms/](https://www.mirrorreader.com/terms/) Apple Standard EULA: [https://www.apple.com/legal/internet-services/itunes/dev/stdeula/](https://www.apple.com/legal/internet-services/itunes/dev/stdeula/) Privacy Policy: [https://www.mirrorreader.com/privacy/](https://www.mirrorreader.com/privacy/)
Screenshots
Verdict
The clearest difference is iOS requirement: DuoBook.co at 16.0 against Mirror Reader's 18.0. On price, update cadence, 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. DuoBook.co sells 1 in-app purchase, starting at $7.99 per month and Mirror Reader sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on September 19, 2026 and September 1, 2026 respectively.
| Parameter | DuoBook.co | Mirror Reader |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 days | Every 4 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 33 MB | 34 MB |
| Age rating | 17+ | 12+ |
| Developer | Emin Onur Karakaslar | VALENTYN VATSEK |
In-app purchases
DuoBook.co
- DuoBook Pro$7.991 Month
Mirror Reader
- Premium Books$5.991 Month
- Premium Books$39.991 Year





