Comparison

Language Diary vs Duory

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

Head to head
About

Language Diary

This app helps you improve language skills by writing a diary with AI-powered corrections for grammar, vocabulary, and syntax. It also offers peer collaboration, AI chat practice, and CEFR level evaluations to enhance your learning journey.

Highlights
  • AI-powered diary corrections
  • Chat and conversation with AI
  • Peer collaboration in teams
  • CEFR level evaluation
  • Voice recording for pronunciation
  • Attach images/videos to entries
  • Passcode lock for privacy
Features
Read full description

LangJournal is a Japanese writing practice app that helps you learn by keeping a diary. Write about your day in Japanese, get AI corrections, understand why each correction was made, and ask questions when you need help. By turning your own thoughts and daily life into Japanese practice, you can build a habit that feels personal, practical, and easy to stick with. [Key Features] ■ Write Japanese with AI corrections Write a short diary entry in Japanese and get instant AI feedback. LangJournal checks grammar, wording, vocabulary choices, and natural phrasing so you can improve your writing step by step. ■ Understand every correction Corrections come with explanations, not just rewritten sentences. You can see what changed and why, helping you avoid the same mistakes next time. ■ Ask AI when you’re stuck After your diary is corrected, ask follow-up questions about grammar, nuance, word choice, or more natural expressions. Learn from your own sentences, not generic examples. ■ Review mistakes with quick quizzes Turn your corrected diary entries into quick review quizzes. Practice the points you missed and build stronger habits through small, focused review. ■ Track your weekly progress Review your writing activity, AI chats, the words you used, and learning progress each week. Seeing your progress helps you stay consistent and understand how your Japanese writing is improving. ■ Practice Japanese with AI chat Chat with AI characters by text or voice. Use topics from your diary, or talk about anything you like, to practice Japanese in a more interactive way. ■ Also supports 10+ languages In addition to Japanese, LangJournal supports English, Korean, Chinese, Spanish, German, French, Portuguese, Dutch, Italian, Polish, Swedish, and Tagalog. You can keep practicing in one app as your language goals grow. ■ Zena keeps you motivated Zena supports your daily learning with encouraging comments based on your activity. Even a short diary entry can become a small step toward improving your Japanese. [Recommended For] • People who want to practice writing Japanese every day • Learners who want AI corrections and grammar explanations • People who want to understand why their Japanese sounds unnatural • Learners who want to ask questions about their own sentences • People who want to build a simple and sustainable language learning habit

About

Duory

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

Language Diary4 screens
Duory4 screens

Verdict

The call

Language Diary and Duory are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Language Diary sells 6 in-app purchases, starting at $4.99 per month 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.

UpkeepUpdate frequency

Language Diary ships an update every 3 days, Duory every 5 days. The most recent releases landed on September 20, 2026 and July 6, 2026 respectively.

ScorecardNo meaningful differences
Language Diary versus Duory: the parameters behind the verdict, then further details
ParameterLanguage DiaryDuory
PriceFreeFree
Rating4.4 (26 ratings) — better—
Positive reviews71.4% of reviews—
Number of ratings26 — better—
Update frequencyEvery 3 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.6
Further details — not scored
Size94 MB138 MB
Age rating4+4+
DeveloperDaiki SatoAdegboyega Dada

In-app purchases

6 purchases

Language Diary

Subscriptions6
  • Premium Monthly Subscription7 Days trial$4.991 Month
  • Pro Monthly Subscription7 Days trial$5.991 Month
  • CEFR+ Monthly Subscription$8.991 Month
Show 3 more
  • Premium Yearly Subscription7 Days trial$49.991 Year
  • Pro Yearly Subscription7 Days trial$59.991 Year
  • CEFR+ Yearly Subscription$89.991 Year
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 Language Diary free?
Language Diary is free to download, with in-app purchases available.
Is Duory free?
Duory is free to download, with in-app purchases available.
Do Language Diary or Duory have ads?
Neither Language Diary nor Duory shows ads.
Which is updated more often, Language Diary or Duory?
Language Diary ships an update every 3 days, and Duory every 5 days. Most recently, Language Diary was updated on September 20, 2026 and Duory on July 6, 2026.

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