DuoCards: Vocabulary Builder appears to be a legitimate app. The AppsHunter Legitimacy Score for DuoCards is 93 out of 100 points across 7 verification signals from App Store and developer data.

DuoCards User Reviews

Name: DuoCards: Vocabulary Builder
Rating: 4.7 (1340 reviews)

DuoCards: Vocabulary Builder

DuoCards s.r.o

📚 Education

🎬 Entertainment

Customer Experience

Positive experience63.3% of reviews

Neutral10.5% of reviews

Negative experience26.2% of reviews

~ Based on 591 written reviews from the US App Store.

What users say

Summarized from real user reviews of DuoCards. Based on 1.3K reviews and a 4.7/5 average, it highlights the 4 positives and 4 negatives reviewers mention most about this Education app.

Positive things

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

Negative things

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

Is DuoCards Safe?

DuoCards: Vocabulary Builder appears safe based on user ratings. AppsHunter Safety Score for DuoCards is 94/100.

This assessment is based on 1,340 user ratings, with an App Store average of 4.7/5.

Safety Analysis

93.4% of ratings point to a safe experience

2.5% of ratings suggest some concerns

4.2% of ratings point to a risky experience

~ Based on 1,340 App Store ratings for DuoCards.

Is DuoCards Legit?

DuoCards: Vocabulary Builder appears to be a legitimate app. AppsHunter Legitimacy Score for DuoCards is 93/100.

Based on 93 of 100 points across 7 verification signals from App Store and developer data.

Top reviews

Most Recent Highest Rated Lowest Rated

Списывает деньги даже при отмене подписки!!!

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!!!

TagirovnaDi

3 days ago

Классное приложение

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

Anannaaaaaa

10 days ago

We need this option

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!

Hajar’s

13 days ago

Response from developer

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

best app for me to study words

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

user46800413579igor

23 days ago

Находка

Потрясающее приложение

рдоамо

23 days ago

Response from developer

Hey there! Thanks for the kind words! 💪 Jana from DuoCards

Ai tutor is silly

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.

fff25l

25 days ago

Response from developer

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

Asks for review before I even try the app

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

Dhdbdvehjfb

a month ago

ゴミ

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

osaru08

a month ago

Response from developer

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.

Только чтоб выучить некоторые слова

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.

Nkyiii

a month ago

Response from developer

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

Problemas de conexão

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

Laura1234x

a month ago

Response from developer

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

Супер!

Отличное приложение, удобная система карточек для запоминания, есть курсы для изучения грамматики(не по всем языкам), будет круто, если добавите грамматику турецкого, спасибо!

Эскимос на Гавайях

a month ago

Response from developer

Thank you for your wonderful review! 😊 We're happy to hear you're enjoying DuoCards. As for the suggestion about adding Turkish grammar - we'll pass it on to the team for consideration. Happy learning!

Excellent when it works

Probably the single best and most easy to use flash card app I’ve ever used. I find its tools very helpful. I only wish that I could adjust the pronunciation on cards since sometime the AI picks up the wrong pronunciation for certain kanji. In addition, I seem to get “connection problem” error messages often no matter how good my signal is and I suspect it has more to do with something on the app’s back end than it does the user. It would be great if that could be worked out.

Gambulanglune

a month ago

Response from developer

Thank you for your feedback. We're glad to hear you enjoy the app overall. Regarding pronunciation, its quality is still limited by the capabilities of the underlying AI models. As for the connection errors, we're sorry for the inconvenience. We've sent a fix there, so it should work better.

Excelente

O melhor app de flashcards. Não achei nenhum como esse. Pode colocar frases de exemplos e imagens. Também tem a opção de falar ou digitar a frase. Muito bom!

Natguedes7

2 months ago

Response from developer

Hello, thank you for your wonderful review! 😊 We're delighted to hear that DuoCards is your favorite flashcard app and that you enjoy the features. Happy learning!

Gute Lern App mit leichten Einschränkungen

Schade dass die Stimme von dem Elefanten nicht sehr authentisch klingt.

Coopy 1507

2 months ago

Response from developer

Hi, sorry to hear that you're having trouble! Please try reinstalling the app. If that doesn’t help, contact us through the help desk within the app. We’ll do our best to help! 💪Michaela from DuoCards

I love this app ❤️

This app better that other apps and there is no so mush limits and this really helped me to learn English

KUSHAN KHP

2 months ago

No to AI

I cancelled my subscription.

AdamCJ540

2 months ago

Response from developer

Hello, we would be glad to hear what didn't work well for you. Please reach out to us at info@duocards.com. Cheers, Jana from DuoCards

Мобильный интернет

Удалю приложение, не работает на мобильной интернете

Sv1608

2 months ago

Response from developer

Hello, sorry to hear that. Please reinstall the app. If it won´t help, reach out to us at info@duocards.com so we can help you further. Cheers, Jana from DuoCards

Need To Improve Marathi Language Module

The western language modules are much better developed , structured, and Colloquial while the marathi version is a disorganized (no intended structure ) . the translation being taught my family of modern day marathi speakers have to correct everything I learn off of this platform as no one uses these translations

Bonny....

2 months ago

My favorite learning app

Great app and useful features

Melicat 2000

2 months ago

Excellent language learning tool!

After using it for its basic, free flashcards language learning function, I decided to upgrade to the paid version. It’s a vastly more comprehensive and interesting program. In addition to the excellent space practice flashcard system, you get AI powered learning tools for speaking, listening, generating stories using newly learned to vocabulary, and a tutor. I’ve only been using it for a day now, but I am definitely going to keep subscribing.

joe in st cloud

2 months ago

Response from developer

Hi Joe, We're thrilled you're finding value in the upgraded version of our app and are considering a continued subscription! It's fantastic to know that the advanced learning tools, like AI-powered speaking, listening, story generation, and the tutor, are enhancing your experience beyond the free flashcards. Cheers, Jana from DuoCards