DuoCards vs Language In Use
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
Language In Use
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What started as a simple idea has grown into a multilingual learning tool. It is free to use, with adverts helping to fund the work. I keep improving it, and I would love your feedback. When I started learning English, my teacher told me to keep a rubrica: a notebook for new words, their translations, and regular revision. The method worked. The notebook did not — it stayed at home, it never told me what I had forgotten, and it never once tested me. Language In Use is that notebook, rebuilt for your phone. BUILD YOUR OWN DICTIONARIES Add words, sentences and idioms in any language pair, with translations, notes, gender, articles, verb tenses and pictures. Sort them into as many dictionaries as you like. Everything is kept on your device, so you can revise on a plane or underground, and it syncs with your account when you are back online. PRACTISE WITH OVER 15 GAMES Your own words become the questions: Flash Cards, Quiz, Listening, Hangman, Word guess, Word search, Crossword, Word wheel, Gender, Picture, Fill the gap, Sentence builder, Word builder and more. Verbs get their own Conjugation challenge across tenses. LOOK UP, LISTEN, ASK Search a word's meaning or a verb's full conjugation from the home page. Hear the pronunciation where audio is available. Ask the AI tutor when a rule refuses to sit still. JOIN THE COMMUNITY Chat with other learners one to one or in groups, and follow learning groups where members post questions, tips and news. KEEP THE STREAK Experience points, levels, daily streaks and practice-time statistics show your progress week by week, in the app and on the website. ON EVERY SCREEN YOU OWN iPhone and iPad, in light or dark mode, with the boards and cards laid out for the screen you are holding. Free to use with adverts. Optional in-app purchases top up lives, and an optional subscription removes the adverts for unlimited play. Your dictionaries stay yours either way. The app speaks English, Italian, Spanish, French, German and Portuguese — and you can learn any language pair you like. Ideas, bugs and feedback: languageinuse.com/contact Terms of Use (EULA): https://languageinuse.com/terms Privacy Policy: https://languageinuse.com/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: DuoCards at 13.0 against Language In Use's 15.0. 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. DuoCards sells 10 in-app purchases, starting at $19.99 per month and Language In Use sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
DuoCards ships an update monthly, Language In Use every 2 months. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.
| Parameter | DuoCards | Language In Use |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.4K ratings) — better | — |
| Positive reviews | 63.1% of reviews | — |
| Number of ratings | 1.4K — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 19 MB | 153 MB |
| Age rating | 4+ | 4+ |
| Developer | DuoCards s.r.o | Enrico Rossini |
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
Language In Use
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
Language In Use
- 150 Game Life$0.99
- 300 Game Life$1.99
Questions
Is DuoCards free?
Is Language In Use free?
Do DuoCards or Language In Use have ads?
Which is updated more often, DuoCards or Language In Use?
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