Comparison

AI英会話 無限にトークできる vs Language Diary

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

Head to head
About

AI英会話 無限にトークできる

Practice English conversation with AI for free. This app offers unlimited speaking practice, translation support, and instant sentence composition exercises to improve your skills. Ideal for beginners and those seeking affordable, flexible language learning.

Highlights
  • Unlimited AI conversation practice
  • Sentence translation support
  • Instant sentence composition exercises
  • AI-powered sentence correction
  • Conversation themes and situations
  • Vocabulary builder
  • Speaking history log
Features
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◆ 累計30万DL突破! ◆ 日経ビジネス掲載の国産アプリ! AIと無料で無限に英会話できる endless(エンドレス)を使用することで、初心者でも英会話を気軽に試すことができます。 endlessはAIと英会話して英語学習できる無料アプリです。 初心者でも英会話が上達するようにサポートします。 毎日の英会話を楽しく気軽に学習してスキルアップしましょう。 ■「AI英会話 endless」の機能 ・AIと英会話フリートーク ・初心者でも英会話しやすく話したい文章を英語翻訳して英会話サポート ・会話テーマからAIと英会話 ・会話シチュエーションからAIと英会話 ・瞬間英作文による英会話 ・瞬間英作文した英語文章の添削 ・テーマに沿った瞬間英作文 ・瞬間英作文を保存して一覧化 ・出題された瞬間英作文の復習 ・独り言英会話 ・英単語帳 ・英会話履歴 ■こんな方におすすめ! ・AIと気軽に英会話したい ・英会話のスキルがない英会話初心者 ・オンライン英会話が億劫 ・英会話サービスの料金が高くて無料で試したい ・たくさんの量の英会話をしたい ・隙間時間で英会話したい ・英会話の文章をAIで添削してほしい ・英会話の文章がなかなか出てこなくて瞬間英作文したい ・AIで無限に瞬間英作文したい ・瞬間英作文の回答をAIがチェックしてほしい ・間違えやすい瞬間英作文を何回も復習したい ・独り言英会話で英語文章の添削してほしい ・英語日記の感覚で発話したい 「AI英会話 endless」は英会話が上達したい方に少しでもご活用いただけましたら幸いです。

About

Language Diary

Practice a new language by writing a daily diary. AI provides corrections, explanations, and follow-up questions to improve your grammar and natural expression. Engage in AI chats and review exercises to reinforce learning and track progress.

Highlights
  • AI diary corrections and explanations
  • Ask AI questions about writing
  • Review exercises based on mistakes
  • Weekly progress reports
  • CEFR level analysis for English
  • Chat with AI characters
  • Support for 13 languages
  • Share diaries with teams
Features
Read full description

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

Screenshots

AI英会話 無限にトークできる4 screens
Language Diary4 screens

Verdict

The call

The clearest difference is ads: Language Diary at none against AI英会話 無限にトークできる's shown. Language Diary also leads on update cadence (every 2 days vs every 5 days). AI英会話 無限にトークできる's advantage is rating (4.7 vs 4.4). On price, review sentiment, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AI英会話 無限にトークできる sells 5 in-app purchases, starting at $4.99 per month and Language Diary sells 6 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

AI英会話 無限にトークできる holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 35 and 27 respectively. Written reviews complicate that: 85% of AI英会話 無限にトークできる's written reviews are positive against 89% of Language Diary's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

AI英会話 無限にトークできる ships an update every 5 days, Language Diary every 2 days. Both last shipped on November 7, 2026.

Scorecard3 real differences · 7 level
AI英会話 無限にトークできる versus Language Diary: the parameters behind the verdict, then further details
ParameterAI英会話 無限にトークできるLanguage Diary
PriceFreeFree
Rating4.7 (35 ratings) — better4.4 (27 ratings)
Positive reviews85.2% of reviews89.3% of reviews — better
Number of ratings35 — better27
Update frequencyEvery 5 daysEvery 2 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.4
Further details — not scored
Size186 MB155 MB
Age rating4+4+
DeveloperPurple IncorporatedDaiki Sato

Customer experience

AI英会話 無限にトークできる

All ratings35 ratings
Positive94.3%
Neutral5.7%
Negative0.0%
Written reviews27 reviews
Positive85.2%
Neutral7.4%
Negative7.4%

Language Diary

All ratings27 ratings
Positive85.2%
Neutral7.4%
Negative7.4%
Written reviews28 reviews
Positive89.3%
Neutral3.6%
Negative7.1%

In-app purchases

5 purchases

AI英会話 無限にトークできる

Subscriptions5
  • Premium Plus 月額プラン3 Days trial$4.991 Month
  • Premium Pro 月額プラン3 Days trial$9.991 Month
  • Premium Plus 年額プラン3 Days trial$29.991 Year
Show 2 more
  • Premium Pro 年額プラン1 Year trial$69.991 Year
  • Premium Pro 年額プラン3 Days trial$69.991 Year
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

Questions

Is AI英会話 無限にトークできる free?
AI英会話 無限にトークできる is free to download, with in-app purchases available.
Is Language Diary free?
Language Diary is free to download, with in-app purchases available.
Which has better reviews, AI英会話 無限にトークできる or Language Diary?
AI英会話 無限にトークできる is rated higher. AI英会話 無限にトークできる averages 4.7 out of 5 from 35 ratings, while Language Diary averages 4.4 from 27 ratings.
Do AI英会話 無限にトークできる or Language Diary have ads?
AI英会話 無限にトークできる shows ads; Language Diary does not.
Which is updated more often, AI英会話 無限にトークできる or Language Diary?
AI英会話 無限にトークできる ships an update every 5 days, and Language Diary every 2 days. Most recently, AI英会話 無限にトークできる was updated on November 7, 2026 and Language Diary on November 7, 2026.

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