Language Diary vs Duory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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LangJournal helps you learn a language by keeping a diary, with AI corrections, explanations, follow-up questions, and review exercises. Write about your day in the language you're learning. AI checks grammar and unnatural expressions and helps you make your writing clearer and more natural. Each correction comes with an explanation, so you can understand why a change is needed and develop your writing skills. When you're unsure about an expression, you can ask AI directly. Ask questions about your diary, such as "Does this sound natural?", "What's the difference between 'the' and 'a'?", or "How can I say this more casually?" Keeping a diary is a way to practice writing and build a daily habit of using the language. Start with one short sentence and gradually build your grammar, vocabulary, and range of expressions. [Key Features] ■ Write a Diary With AI Corrections AI checks your diary as soon as you submit it. Get help with grammar, vocabulary, and unnatural expressions to make your writing more natural. ■ Understand Why a Correction Is Needed See why each corrected part needs to change. Review your writing with explanations, rather than just looking at the corrected answer. ■ Ask AI About Your Diary Ask AI any questions you still have after a correction. Explore nuances, grammar, alternative wording, and more natural ways to express yourself. ■ Review Your Mistakes Review by writing sentences in exercises based on corrections from your diary. Practice reducing repeated mistakes and reinforcing what you've learned. ■ Look Back With Weekly Reports Review your diary entries, AI chats, words used, and words used for the first time each week. See how many days you've practiced and how much you've done to help build a learning habit. ■ Check Your English Level With CEFR Analysis Analyze your diary against CEFR levels to get an indication of your English proficiency. See an overall assessment and breakdowns covering vocabulary, grammar, and verb forms. This feature is currently available for English learners. ■ Learn by Chatting With AI Characters Talk with AI characters such as Zena, Zeb, Leon, and Mari by text or voice. Build on topics from your diary or discuss a topic you enjoy to get more practice using the language. ■ Learn in 13 Languages Study English, Korean, Japanese, Chinese, Spanish, German, French, Italian, Portuguese, Dutch, Polish, Swedish, or Tagalog. ■ Share Diaries With a Team Join a team to share diary entries and exchange comments with others learning the same language. Learning together can help you keep going when it's hard to stay consistent on your own. This feature is currently available for learners of English, German, and Korean. ■ Get Daily Support From Zena Zena supports you with comments based on your learning activity. Start with a short diary entry and find encouragement to keep learning each day. [Recommended For] ■ Learners who want to develop natural expressions by keeping a diary ■ People who want to practice writing with AI corrections ■ Learners who want to understand their mistakes and avoid repeating them ■ People who want to learn at their own pace while asking AI questions ■ Learners who want more opportunities to use the language every day ■ People who find it hard to stay consistent alone and want to enjoy learning languages
Duory
This app helps you study, practice, and journal in your target languages. It centralizes your language notes, vocabulary, and phrases, offering hands-free practice and journaling features. Capture phrases from anywhere and reinforce learning with widgets.
- Organize notes for multiple languages
- Hands-free practice
- Journaling in target languages
- Capture phrases from various sources
- Vocabulary browsing from notes
- Home and Lock Screen widgets
- On-device language tasks
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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
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Verdict
The clearest difference is review sentiment: Language Diary at 89% against Duory's 0%. Language Diary also leads on rating (4.4 vs 1.0) and ratings volume (27 vs 1). On price, update cadence, ads and in-app purchases 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
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.
Language Diary holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Language Diary has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 89% of Language Diary's written reviews are positive against 0% of Duory's.
Language Diary ships an update every 3 days, Duory every 5 days. The most recent releases landed on October 15, 2026 and September 26, 2026 respectively.
| Parameter | Language Diary | Duory |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (27 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 88.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 27 — better | 1 |
| Update frequency | Every 3 days — better | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 18.6 |
| Further details — not scored | ||
| Size | 100 MB | 148 MB |
| Age rating | 4+ | 4+ |
| Developer | Daiki Sato | Adegboyega Dada |
Customer experience
Language Diary
Duory
In-app purchases
Language Diary
- Premium Monthly Subscription7 Days trial$4.991 Month
- Pro Monthly Subscription7 Days trial$5.991 Month
- CEFR+ Monthly Subscription$8.991 Month
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- Premium Yearly Subscription7 Days trial$49.991 Year
- Pro Yearly Subscription7 Days trial$59.991 Year
- CEFR+ Yearly Subscription$89.991 Year
Duory
- Duory Plus (Monthly)$2.991 Month
- Duory Family Plus (Monthly)$4.991 Month
- Duory Plus (Annual)14 Days trial$29.991 Year
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- Duory Family Plus (Annual)14 Days trial$49.991 Year









