Comparison

Karteto vs Duory

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

Head to head
About

Karteto

Expand your vocabulary and learn new languages with interactive flashcards. This app uses spaced repetition to help you memorize words effectively across over 100 languages. Create personalized decks, track progress, and enjoy engaging learning methods.

Highlights
  • Personalized flashcard decks
  • Spaced repetition system
  • Audio pronunciation and stories
  • Word map for connections
  • Public and custom word themes
  • Integrated dictionary
  • Visual learning with images
Features
Read full description

Ready to expand your vocabulary and learn a new language? Join thousands of language learners who use Karteto as their go-to vocab builder and flashcard maker. Karteto makes learning different languages fast, fun, and easy. Whether you're looking to practice Spanish, English, Korean, Japanese, French, German, or 100+ other languages, Karteto has got you covered. Karteto is designed to help you learn languages effectively with interactive language flashcards. Studies show that learning needs to be fun to be effective. Karteto ensures every lesson keeps you engaged and motivated. Practice vocabulary in over 100 languages, including Hebrew, Chinese, Russian, and Arabic. Why Choose Karteto? Karteto isn’t just another language app. It’s a powerful vocab builder that adapts to your learning style and helps you memorize words effortlessly. Using spaced repetition, Karteto predicts the optimal time to review a word, ensuring long-term retention. • Flashcard maker: Create personalized decks and tailor your learning experience. • Language flashcards: Memorize new words with interactive and image-supported cards. • Expand vocabulary: Learn new words daily and track your progress. • Learn a new language: Choose from beginner to advanced levels for each language. • Learn different languages: Study multiple languages at once and compare words. • Vocab builder: Unlock achievements and earn rewards as you progress. • Foreign language immersion: Listen to pronunciation, learn word meanings, and use words in context. • Learn to speak languages like: English, Spanish, Korean, Japanese, German, French, Portuguese, Russian, Italian, Arabic, Tagalog, Hebrew, Icelandic, Polish, Mandarin Chinese, Turkish, Cantonese Chinese, Dutch, Norwegian, Thai, Swedish, Vietnamese, Maori, Farsi (Persian), Hungarian, Greek, Hindi, Danish, Samoan, Indonesian, Finnish, Serbian, Croatian, Esperanto, Estonian, Ukrainian, Yoruba, Bosnian, Swahili, Igbo, Sanskrit, and even Ainu. Amazing Features You’ll Love: • Personal card decks – Organize your vocabulary efficiently. • Spaced Repetition – Improve retention and recall. • Audio List – Listen to words and perfect your pronunciation. • Audio Stories – Learn words in context through engaging audio content. • Word map – Visually explore connections between words. • Public decks – Access shared vocab lists for different topics and languages. • Custom word themes – Focus on specific topics like travel, business, or daily conversation. • Integrated dictionary – Instantly look up word meanings and translations. • Flexible learning settings – Adjust speed, difficulty, and focus areas. • Card pair mode – Reinforce learning with fun matching exercises. • Images for all words – Enhance memory retention with visual associations. • Word pronunciation – Listen to native speakers for accurate pronunciation. • Learning reminders – Stay on track with timely notifications. Try Karteto Premium with our free trial. Download the app to learn about different membership options, and register to learn all about exclusive discounts. Have feedback or suggestions? Send us an email at support@karteto.com. We’d love to hear from you. Terms of Service: https://www.karteto.com/tos Privacy Policy: https://www.karteto.com/privacy

About

Duory

This app helps you learn languages by organizing your notes, practicing vocabulary, and journaling in your target languages. It offers features like translation, pronunciation recording, and widgets to reinforce learning.

Highlights
  • Organize notes for multiple languages
  • Practice vocabulary hands-free
  • Journal in target languages
  • Capture phrases from various sources
  • Home and Lock Screen widgets
  • In-app translation and transliteration
  • Record and playback pronunciation
Features
Read full description

Save time and stay focused—no more bouncing between translation apps, Google search and your notes. Study, practice, and reflect with dynamic language notes. Why Duory? • Duory is the smartest way to take language notes on your phone. • Duory lets you keep and organize notes for all your target languages in one place. • Save time and stay focused — no more bouncing between Google Search and your notes. • Practice hands-free while doing boring chores. • Improve your output by journaling in your target languages. • Capture interesting phrases from anywhere! • Browse vocabulary from your own notes in a focused, immersive way. • Make them stick with Home and Lock Screen widgets. • Duory supports 40 target languages. NOTES • Duory is designed to perform language tasks on-device thanks to Apple’s language APIs and other offline language tools. • To perform translations, iOS needs to download language dictionaries for each language pair. This only happens once for each pair. • Duory requires access to your microphone for you to record pronunciation of phrases and your camera for scanning text. FREE FOREVER Get started for free with these features: • Create notes and journals in one target language. • Enhance your language journals with Apple Journaling Suggestions. • Capture phrases from your physical textbooks, Duolingo sessions, images, or RTF/PDF documents. • Use a handy widget to reinforce recently learned words and phrases. • In-app translation and transliteration, including Hiragana and Pinyin. • Record and play back your phrases (no playlists on the free plan). • Access notes you create during your free trial or subscription – forever! Important: If you create notes in target languages outside of the initial language during an active subscription, they will become read-only when your subscription expires (the notes you create in your oldest target language will remain editable forever) DUORY PLUS PLANS Unlock the full power of Duory with a subscription: • Create notes and journals in multiple languages. • Turn your phrases into playlists for hands-free practice. • Control playback from your lock screen or Control Center. • Turn plain notes into memorable ones with stickers and pictures. • Sync your notes and journals to iCloud. Plans are available on a monthly or annual basis. Your payment is charged to your iTunes account. Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. You can turn off auto-renewal at any time by going to your Account Settings on the App Store after purchase. Start your journey with a 14-day free trial on annual plans—cancel anytime to avoid charges. You will always have permanent access to notes created during the trial period or while your subscription was active. However, an active subscription is required to create new notes or edit existing ones in languages other than the first target language you added in Duory. Notes created in the first target language you add to Duory remain editable forever with or without an active subscription. LANGUAGE TRANSLATION SUPPORT ** Duory uses Apple’s Translation API for on-device translation. Here’s the full list of supported languages: • Arabic • Chinese (Mandarin, Simplified) • Chinese (Mandarin, Traditional) • Dutch • English • French • German • Hindi • Indonesian • Italian • Japanese • Korean • Polish • Portuguese (Brazil) • Russian • Spanish (Spain) • Thai • Turkish • Ukrainian • Vietnamese PRIVACY Duory is designed with your privacy in mind. We don’t track your data or store your information. Privacy Policy: https://duory.alewa.co/privacy.html Terms of Service: https://duory.alewa.co/terms.html

Screenshots

Karteto4 screens
Duory4 screens

Verdict

The call

The clearest difference is rating: Karteto at 4.3 against Duory's 1.0. Karteto also leads on review sentiment (33% vs 0%) and ratings volume (485 vs 1). Duory's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model 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. Karteto sells 9 in-app purchases, starting at $9.99 per 7 days and Duory sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Karteto holds the better App Store score, 4.3 against 1.0. That said, the two scores are not equally well evidenced: Karteto has 485 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Karteto's written reviews are positive against 0% of Duory's.

UpkeepUpdate frequency

Karteto ships an update every 9 days, Duory every 5 days. Both last shipped on November 4, 2026.

Scorecard5 real differences · 5 level
Karteto versus Duory: the parameters behind the verdict, then further details
ParameterKartetoDuory
PriceFreeFree
Rating4.3 (485 ratings) — better1.0 (1 ratings)
Positive reviews32.5% of reviews — better0.0% of reviews
Number of ratings485 — better1
Update frequencyEvery 9 daysEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better18.6
Further details — not scored
Size102 MB152 MB
Age rating4+4+
Developerkarteto LLCAdegboyega Dada

Customer experience

Karteto

All ratings485 ratings
Positive81.2%
Neutral4.9%
Negative13.8%
Written reviews163 reviews
Positive32.5%
Neutral13.5%
Negative54.0%

Duory

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Karteto

Reported bugs

4 issues
  • Frequent app crashes
  • Words not loading properly
  • Subscription issues and unexpected charges
  • Incorrect or missing translations

Requested features

5 requests
  • Add ability to report errors in translations
  • Implement spaced repetition settings
  • Include audio pronunciations for all languages
  • Allow users to create and share custom word lists
  • Integrate with other language learning tools

Duory

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Karteto

Subscriptions7
  • Weekly$9.997 Days
  • Monthly7 Days trial$24.991 Month
  • Monthly$24.991 Month
Show 4 more
  • 3 month7 Days trial$49.993 Months
  • 3 months$49.993 Months
  • Annual7 Days trial$95.991 Year
  • Annual$95.991 Year
One-time2
  • Lifetime$299.99
  • Lifetime Plus$299.99
4 purchases

Duory

Subscriptions4
  • Duory Plus (Monthly)$2.991 Month
  • Duory Family Plus (Monthly)$4.991 Month
  • Duory Plus (Annual)14 Days trial$29.991 Year
Show 1 more
  • Duory Family Plus (Annual)14 Days trial$49.991 Year

Questions

Is Karteto free?
Karteto is free to download, with in-app purchases available.
Is Duory free?
Duory is free to download, with in-app purchases available.
Which has better reviews, Karteto or Duory?
Karteto is rated higher. Karteto averages 4.3 out of 5 from 485 ratings, while Duory averages 1.0 from 1 ratings.
Do Karteto or Duory have ads?
Karteto shows ads; Duory does not.
Which is updated more often, Karteto or Duory?
Karteto ships an update every 9 days, and Duory every 5 days. Most recently, Karteto was updated on November 4, 2026 and Duory on November 4, 2026.

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