# DuoCards: Vocabulary Builder — Language Flashcards & AI

> Learn languages with flashcards, video courses, and an integrated translator. (iPhone/iPad app by DuoCards s.r.o.)

- Source: https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917 (this page in markdown: same URL + `.md`)
- Developer: [DuoCards s.r.o](https://appshunter.io/developer/1508159916)
- Category: Education, Entertainment
- Price: Free with in-app purchases
- Rating: 4.70/5 from 1,340 App Store ratings · 591 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: American English
- Released: 2020-04-15
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews.md

## What is DuoCards?

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

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| DuoCards Premium | $49.99 | per year |
| DuoCards Premium | $67.99 | per year |
| DuoCards Premium | $34.99 | per 3 months |
| DuoCards Premium | $113.99 | per year |
| DuoCards Plus | $33.00 | per 3 months |
| DuoCards Premium | $64.90 | per year |
| DuoCards Premium | $107.99 | per year |
| DuoCards Premium | $109.00 | per year |
| DuoCards Premium | $162.99 | per year |
| DuoCards Premium | $19.99 | per month |
| DuoCards Premium | $19.99 | per month |


## What do users think of DuoCards?

Overall sentiment: neutral

**Pros**

- 👍 Easy to use
- 💡 Customizable flashcards
- 🚀 Efficient learning algorithm
- 🐘 Cute mascot (Memo the mammoth)

**Cons**

- 🐛 Bugs and crashes
- ⚠️ Unreliable server connection
- 💰 Expensive subscription
- 🤔 Confusing interface

**Commonly reported bugs**

- App freezes and crashes
- Issues with logging in and accessing content
- Inconsistent behavior when adding new words
- Problems with video playback and subtitles

**Most requested features**

- Offline mode
- More customization options
- Improved spaced repetition system
- Better integration with other language learning tools

## Recent user reviews (10 of 591)

All indexed reviews: https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews.md

### 1/5 — Списывает деньги даже при отмене подписки!!!

*2026-08-27*

Скачала приложение чтобы понять нравится или нет. Была пробная я неделя бесплатная. После суток решила что приложение мне не нравится, отменила подписку и удалила приложение. Через неделю с банка приходит уведомление о попытке списание подписки за это приложение?!! Я в шоке!!!

### 5/5 — Классное приложение

*2026-08-20*

Мне все нравится, но сделайте пожалуйста виджет, для того чтобы напоминать, что нужно пройти урок 🙏🏻

### 4/5 — We need this option

*2026-08-17*

Hi! I really love using Duocards to learn vocabulary with flashcards. I’d really love to have an option to automatically play the example sentence when I flip a flashcard. Right now, I can hear the word, but hearing the example sentence automatically would help me remember the word much better. It would be great if users could turn this option on in the settings. Thank you!

**Developer response:** Hi Hajar, thanks for the feedback! We're happy to hear you're loving Duocards for learning vocabulary. Adding the ability to automatically play example sentences when flipping flashcards is a neat idea for enhancing memory recall. We'll consider this for future updates. Jana from DuoCards

### 5/5 — best app for me to study words

*2026-08-06, version 1.20.16*

я попробовал очень много способов как учить иностранные слова, но только в этом приложении у меня получилось РЕАЛЬНО выучить больше 1050 слов/фраз на английском и больше 600 на итальянском (учил в 2025, запоминал реально быстро и эффективно) Конечно если сюда не заходить, то весь словарь забывается, но это проблемы нашего мозга, а не этого милого мамонтёнка. всем мир

### 5/5 — Находка

*2026-08-06*

Потрясающее приложение

**Developer response:** Hey there! Thanks for the kind words! 💪
Jana from DuoCards

### 1/5 — Ai tutor is silly

*2026-08-05*

The AI tutor is almost completely useless. It always responds with short answers, and no matter what you ask it, it basically says the same thing. 

 You ask it to explain the etymology of a word or phrase, and it just gives you the meaning instead, simply rephrasing it. If you ask it to explain some complex language concepts, it again responds with short phrases that don't mean much. 

 As a result, you might be paying for a premium subscription, but you still have to use ChatGPT to get comprehensive and understandable explanations. I am very disappointed with this app. While many other features work well, this particular aspect has left me frustrated.

**Developer response:** Hey! We hear your frustration with the AI tutor. Our team is continuously working to enhance its ability to provide detailed explanations for a wide range of queries, including etymology and complex language concepts. Could you please let us know some examples of this at support@duocards.com? Thanks!

Cheers,
Jana from DuoCards

### 1/5 — Asks for review before I even try the app

*2026-08-02, version 1.20.16*

How about you let me do a lesson or see your app before you ask me to rate it?

### 1/5 — ゴミ

*2026-07-31*

一度覚えたことになったカードはなぜか二度と練習できない

**Developer response:** Hi Osaru! This usually happens when cards are marked as learned. If you still want to learn those same cards, then don't swipe them to the right.

### 3/5 — Только чтоб выучить некоторые слова

*2026-07-28*

Приложение работает только для изучения слов. Больше никакие разделы не открываются (практика, библиотека).
Часто пишет, что нет связи с сетью, хотя сижу через вайфай и остальные приложения работают нормально. Постоянно предлагает купить платную версию. Есть сомнения, что после этого приложение не будет выдавать ошибок, т.к. как бесплатную версию не тянет даже.

**Developer response:** Hey! We're sorry to hear you're having trouble accessing practice and library sections and are seeing network connection errors. 💔 This usually resolves when a VPN is enabled. If the issue persists, please reach out to support@duocards.com with your device and OS details so we can help. Jana from DuoCards

### 1/5 — Problemas de conexão

*2026-07-21*

Ele fica dando erro de conexão sem ter falha na conexão. Ele é o único app que tenho que dá esse problema

**Developer response:** Hello,
Please try reinstalling the application and check if the problem persists. If the issue continues, kindly reach out to us at support@duocards.com with details about your device and operating system so we can investigate further.
Jana from DuoCards

## Frequently asked questions about DuoCards

### What does DuoCards do?

DuoCards is a language learning application designed to help users acquire new languages or enhance their existing vocabulary. It utilizes a combination of interactive flashcards, video language courses, and an integrated translator to facilitate effective learning.

### How does the flashcard learning method work?

The app employs a spaced repetition system with flashcards. Users view foreign words or phrases and swipe them to indicate if they are known or unknown. This method ensures that words are repeated at optimal intervals for memorization and vocabulary building.

### What languages can I learn with DuoCards?

DuoCards supports learning over 50 foreign languages, including popular options like English, Spanish, French, German, and Portuguese. The integrated translator further enhances the learning experience for a wide range of languages.

### Is DuoCards free to use?

The app is free to download and use, offering core language learning features at no initial cost. However, it does include in-app purchases, which may unlock additional content or advanced functionalities for users who wish to enhance their learning experience.

### Can I learn from videos with DuoCards?

Yes, DuoCards offers video language courses. You can watch YouTube videos with subtitles, and the app allows you to interact with unknown words by pausing the video and displaying their translations, making learning from multimedia content seamless.

## Version history (last 5 releases)

### 1.20.17 — 2026-08-29

AI Roleplay - Practise real-world conversations in simulated scenarios
AI Stories - Interactive stories with comprehension exercises
Bookmarks - Save your current progress in an article for later
Transliteration - Read Chinese, Arabic, and Japanese scripts easily
Auto Dark Mode - Study comfortably day or night
Smarter Translations - Context-aware translations
AI Grammar Feedback - Accurate corrections with explanations

### 1.20.16 — 2026-01-23

AI Roleplay - Practice real-world conversations in simulated scenarios
AI Stories - Interactive stories with comprehension exercises
Bookmarks - Save your current progress in an article for later
Transliteration - Read Chinese, Arabic, Japanese scripts easily
Auto Dark Mode - Study comfortably day or night
Smarter Translations - Context-aware translations
AI Grammar Feedback - Accurate corrections with explanations

### 1.20.15 — 2025-11-04

Smarter learning algorithm that helps you learn more effectively.
Enhanced AI that provides better grammar explanations, personalized stories, and more accurately responds.
New study sets with new vocabulary focused on learning popular topics.
Optimized notifications system to help maintain your daily streak.
Performance upgrades and bug fixes for smoother studying.

### 1.20.10 — 2025-10-01

Smarter learning algorithm that helps you learn more effectively.
Enhanced AI that provides better grammar explanations, personalized stories, and more accurately responds.
New study sets with new vocabulary focused on learning popular topics.
Optimized notifications system to help maintain your daily streak.
Performance upgrades and bug fixes for smoother studying.

### 1.20.9 — 2025-09-18

Smarter learning algorithm that helps you learn more effectively.
Enhanced AI that provides better grammar explanations, personalized stories, and more accurately responds.
New study sets with new vocabulary focused on learning popular topics.
Optimized notifications system to help maintain your daily streak.
Performance upgrades and bug fixes for smoother studying.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*