DuoCards vs Readlang Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DuoCards
Master a new language with interactive flashcards and video courses. This app helps you build vocabulary, guess words, and track your progress across over 50 languages. Learn effectively through spaced repetition and integrated translation tools.
- Flashcard learning with spaced repetition
- Video language courses with interactive subtitles
- Integrated translator for over 50 languages
- Vocabulary builder and progress tracker
- Guess words and phrases to sharpen skills
- Read foreign language articles
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Build vocabulary from the real content you already enjoy. DuoCards helps you save new words from videos, articles, shared decks, and your own notes, then remember them with smart flashcards and spaced repetition. Why learners choose DuoCards: - Save words and phrases from videos, subtitles, and articles - Practice with an AI tutor for real-life conversations - Improve pronunciation with instant feedback - Review vocabulary with flashcards that adapt to your progress - Learn English, Spanish, French, German, Japanese, Korean, and 50+ languages - Use ready-made courses, public decks, or your own personal word lists Learn in a simple loop: 1. Discover useful words in context 2. Save them to your personal deck 3. Review, speak, listen, and remember Whether you are learning for travel, school, work, or everyday conversations, DuoCards gives you a flexible way to build vocabulary and keep it in memory. Download DuoCards and start building your language habit today. Terms of use: https://www.duocards.com/termsofuse.html Privacy policy: https://www.duocards.com/privacypolicy.html
Readlang Mobile
Learn languages by reading content you enjoy. Tap any word for instant translation, save new vocabulary, and track your learning progress. Offers a free plan with daily limits and a premium subscription for unlimited access and advanced features.
- Instant word and phrase translation
- Save and review translated words
- Read websites and EPUB books
- Vocabulary practice
- Progress tracking
- Distraction-free reading
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Readlang Mobile Readlang Mobile helps you learn languages naturally by reading real content you actually enjoy — books, articles, and websites. Tap any word or phrase to see an instant translation without breaking your flow. Save new words, track your progress, and build vocabulary effortlessly while reading. Key Features: • Instant word translation while reading • Phrase translation support • Save and review translated words • Clean, distraction-free reading experience • Reading statistics and progress tracking • Read websites and books directly in the app Free Plan: • 30 translations per day • Phrase translations (up to 6 words) • Access to all books and websites in the app • View basic reading statistics Premium Features: • Unlimited translations • Phrase translations (up to 12 words) • Upload and read your own EPUB books • Multiple-choice vocabulary practice • Full access to advanced reading tools Subscription Information: Readlang Mobile offers auto-renewable subscriptions: • Monthly subscription • Yearly subscription (save with annual billing) Prices may vary by location and are shown in the app. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple ID account settings. Legal: Terms of Use: https://readlang-mobile.com/terms Privacy Policy: https://readlang-mobile.com/privacy Contact: Support: support@readlang-mobile.com Website: https://readlang-mobile.com
Screenshots
Verdict
The clearest difference is review sentiment: Readlang Mobile at 100% against DuoCards's 63%. Readlang Mobile also leads on ads (none vs shown) and update cadence (every 6 days vs monthly). DuoCards's advantage is ratings volume (1.3K vs 4) and rating (4.7 vs 4.5). 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. DuoCards sells 10 in-app purchases, starting at $19.99 per month and Readlang Mobile sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.
DuoCards holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: DuoCards has 1.3K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 63% of DuoCards's written reviews are positive against 100% of Readlang Mobile's, so the app with the better star average is not the one people write more warmly about.
DuoCards ships an update monthly, Readlang Mobile every 6 days. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.
| Parameter | DuoCards | Readlang Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.3K ratings) — better | 4.5 (4 ratings) |
| Positive reviews | 63.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.3K — better | 4 |
| Update frequency | Monthly | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 19 MB | 37 MB |
| Age rating | 4+ | 17+ |
| Developer | DuoCards s.r.o | Alisher Fayzullaev |
Customer experience
DuoCards
Readlang Mobile
Bugs and requests
DuoCards
Reported bugs
4 issues- App freezes and crashes
- Issues with logging in and accessing content
- Inconsistent behavior when adding new words
- Problems with video playback and subtitles
Requested features
4 requests- Offline mode
- More customization options
- Improved spaced repetition system
- Better integration with other language learning tools
Readlang Mobile
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DuoCards
- DuoCards Premium2 variants$19.991 Month
- DuoCards Plus$33.003 Months
- DuoCards Premium$34.993 Months
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- DuoCards Premium$49.991 Year
- DuoCards Premium7 Days trial$64.901 Year
- DuoCards Premium7 Days trial$67.991 Year
- DuoCards Premium1 Year trial$107.991 Year
- DuoCards Premium7 Days trial$109.001 Year
- DuoCards Premium7 Days trial$113.991 Year
- DuoCards Premium1 Year trial$162.991 Year
Readlang Mobile
- Readly Premium Monthly$6.991 Month
- Readly Premium Yearly1 Year trial$39.991 Year
Questions
Is DuoCards free?
Is Readlang Mobile free?
Which has better reviews, DuoCards or Readlang Mobile?
Do DuoCards or Readlang Mobile have ads?
Which is updated more often, DuoCards or Readlang Mobile?
Other comparisons
