Comparison

DuoCards vs Graded Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Graded Reader

Master a new language through AI-generated stories tailored to your proficiency level. Enhance comprehension with integrated audio and instant translations. Supports numerous languages for immersive learning.

Highlights
  • AI Story Generator
  • Audio Reader & Listening Practice
  • CEFR-Based Leveling
  • Instant Word & Sentence Translation
  • Multi-language Support
Features
Read full description

Master a new language with infinite stories tailored exactly to your proficiency level. Gradia is an AI-powered language learning companion that generates unique, engaging stories in your target language. Whether you are a complete beginner or an advanced learner, Gradia creates reading material that matches your CEFR level instantly. Combine reading with listening using our built-in Audio Reader, and never get stuck thanks to instant word and sentence translations. - KEY FEATURES - AI Story Generator Never run out of reading material. Unlike static textbooks, Gradia uses advanced AI to generate fresh, interesting stories on demand. Tailored Content: Every story is written specifically for your selected difficulty level. Endless Practice: Create new stories whenever you want to practice reading. - Audio Reader & Listening Practice Turn your reading session into a listening lesson. Text-to-Speech: Listen to stories read aloud with natural-sounding AI voices. Improve Pronunciation: Shadow the audio to perfect your accent. Immersive Learning: Listen while you read to reinforce comprehension. - CEFR-Based Leveling Select your proficiency, and our AI ensures the vocabulary and grammar are just right for you: A1 - A2 (Beginner): Simple stories with basic vocabulary to build confidence. B1 - B2 (Intermediate): More complex narratives to improve fluency and grammar. C1 - C2 (Advanced): Sophisticated storytelling for near-native mastery. - Instant Translation Read without the frustration of switching apps to check a dictionary. Word Translation: Tap any specific word to see its meaning. Sentence Translation: Tap a full sentence to understand the context and structure. Flow State: Keep reading smoothly while learning new vocabulary instantly. - READ IN ANY LANGUAGE Gradia supports story generation and translation for most major languages. Whether you are learning Spanish, French, German, Italian, Japanese, Chinese, Korean, or English, Gradia provides the content you need. WHY CHOOSE GRADIA? 1. Comprehensible Input: The fastest way to learn a language is by reading content that is slightly above your current level. Gradia automates this by creating stories that are never too hard and never too easy. 2. Contextual Learning: Learn vocabulary naturally within the context of a story, rather than memorizing dry lists. 3. Dual-Modality: By reading and listening simultaneously, you accelerate your brain's ability to process the new language. PERFECT FOR: Language students wanting fun practice outside the classroom. Self-learners looking for graded reading material. Polyglots maintaining multiple languages. Start Your Story Today Stop searching for "easy books" that are actually too difficult. Download Gradia and generate your first custom language story now! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

DuoCards4 screens
Graded Reader4 screens

Verdict

The call

The clearest difference is ads: Graded Reader at none against DuoCards's shown. Graded Reader also leads on rating (5.0 vs 4.7). DuoCards's advantage is update cadence (monthly vs every 8 months) and ratings volume (1.4K vs 1). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month and Graded Reader sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Graded Reader holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: DuoCards has 1.4K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

DuoCards ships an update monthly, Graded Reader every 8 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
DuoCards versus Graded Reader: the parameters behind the verdict, then further details
ParameterDuoCardsGraded Reader
PriceFreeFree
Rating4.7 (1.4K ratings)5.0 (1 ratings) — better
Positive reviews63.1% of reviews—
Number of ratings1.4K — better1
Update frequencyMonthly — betterEvery 8 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size19 MB90 MB
Age rating4+4+
DeveloperDuoCards s.r.oBetapilot

Customer experience

DuoCards

All ratings1,340 ratings
Positive93.4%
Neutral2.5%
Negative4.2%
Written reviews594 reviews
Positive63.1%
Neutral10.4%
Negative26.4%

Graded Reader

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

Graded Reader

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

DuoCards

Subscriptions10
  • DuoCards Premium2 variants$19.991 Month
  • DuoCards Plus$33.003 Months
  • DuoCards Premium$34.993 Months
Show 7 more
  • 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
2 purchases

Graded Reader

Subscriptions2
  • Reader$4.991 Month
  • Listener$12.991 Month

Questions

Is DuoCards free?
DuoCards is free to download, with in-app purchases available.
Is Graded Reader free?
Graded Reader is free to download, with in-app purchases available.
Which has better reviews, DuoCards or Graded Reader?
Graded Reader is rated higher. DuoCards averages 4.7 out of 5 from 1.4K ratings, while Graded Reader averages 5.0 from 1 ratings.
Do DuoCards or Graded Reader have ads?
DuoCards shows ads; Graded Reader does not.
Which is updated more often, DuoCards or Graded Reader?
DuoCards ships an update monthly, and Graded Reader every 8 months. Most recently, DuoCards was updated on October 29, 2026 and Graded Reader on October 30, 2026.

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