Duoler vs Read with Booki
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Duoler
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Learn a language from the videos you actually want to watch. Import a movie, show, lecture or any other video from the Files app. No subtitles? Duoler creates them with AI right on your iPhone, and can add a translation line to make bilingual subtitles. Tap any word or sentence to translate it, then save it to your notebook together with the video frame and audio clip. AI SUBTITLES ON YOUR IPHONE • Speech recognition in 11 languages: English, Chinese (Simplified and Traditional), Cantonese, Japanese, Korean, French, German, Spanish, Italian and Portuguese • Bilingual subtitles with translation into 20 languages • Everything runs on your device. Your videos are never uploaded TAP TO TRANSLATE • Tap a word or a whole sentence while you watch • Uses Apple's on-device translation (iOS downloads each language once) A NOTEBOOK WITH CONTEXT • Double-tap a word to save it, or save the whole sentence • Every item keeps the video frame and audio clip it came from, so you can hear it again MADE FOR LISTENING PRACTICE • Split a video into 3- or 5-minute practice sections • Move through Listen, Study and Review phases, with subtitles hidden when needed • Loop one sentence, mark difficult moments, and resume where you stopped • Review saved words and sentences with their original audio • Jump by sentence or 10 seconds, change speed, and adjust subtitle timing MORE LOCAL VIDEO FORMATS • Reference the original file to save space, or keep an independent copy in Duoler • Local playback for common formats including MKV and WebM with VP9 or AV1, when the file's tracks are supported YOUR OWN SUBTITLES WORK TOO • Import SRT, VTT or ASS/SSA files • Edit subtitle text and timing, and export SRT files PRIVATE BY DESIGN No account, no ads, no tracking. Your videos, subtitles and notebook stay on your device. FREE AND PREMIUM Free: play videos with your own subtitles, tap to translate, save unlimited words and sentences, create AI subtitles for 5 minutes a day (up to 5 minutes per video), and export the subtitles you imported. Premium: unlimited AI subtitles and export of AI-generated subtitles, billed monthly or yearly. Eligible new subscribers can try the yearly plan free. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Settings > [your name] > Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://duoler.vercel.app/privacy
Read with Booki
This interactive reading app transforms classic literature into a personalized English learning experience. An AI companion helps you understand vocabulary in context, generates custom quizzes, and provides pronunciation guidance. Explore a curated library of timeless stories while improving your language skills.
- Tap-to-learn vocabulary in context
- AI-generated vocabulary quizzes
- Interactive AI reading companion
- Native audio pronunciation
- Curated library of classic literature
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Read with Booki: Your AI Reading Companion Unlock the joy of reading and mastering English with Read with Booki, an interactive reading app that turns classic literature into a personalized language-learning journey. Whether you are expanding your vocabulary or simply getting lost in a good story, your AI companion, Booki, is by your side to guide you every step of the way. Key Features: Tap-to-Learn In Context Encounter a word you don't know? Simply tap it! Booki goes beyond standard dictionary definitions by instantly explaining the word in the exact context of the sentence you are reading. You'll understand the nuance of the word immediately without ever losing your place in the story. AI-Generated Vocabulary Quizzes Turn your reading into active learning. Booki automatically remembers every word you look up and generates custom, interactive multiple-choice quizzes to test your memory. You'll only be tested on the exact words you struggled with, ensuring you master them for good. Interactive AI Companion Meet Booki, your friendly, animated reading buddy. Booki floats alongside you as you read, offering encouragement, insights, and instant answers to any questions you have about the book or its characters through a built-in AI chat. Native Audio Pronunciation Listen and learn. Booki features high-quality text-to-speech pronunciation for your vocabulary words, ensuring you master the correct intonation and spelling as you study. Curated Classic Library Dive into a beautiful, distraction-free library of timeless classics, carefully formatted with elegant typography for optimal reading and concentration. Rediscover the magic of classic literature while effortlessly expanding your English skills. Download Read with Booki today and turn your next great book into your best teacher! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://florithm.com/privacy-read-with-booki.html
Screenshots
Verdict
The clearest difference is update cadence: Read with Booki at daily against Duoler's every 3 months. Read with Booki also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.1). On price, 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. Duoler sells 2 in-app purchases, starting at $2.99 per month and Read with Booki sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Duoler ships an update every 3 months, Read with Booki daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Duoler | Read with Booki |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 642 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | 翠涓 徐 | Florithm LLC |
In-app purchases
Duoler
- Monthly Subscription$2.991 Month
- Annual Subscription7 Days trial$24.991 Year
Read with Booki
- Booki Premium$0.991 Month
- Booki Premium3 Days trial$9.991 Year









