Comparison

Duoreader vs Learn Languages

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

Head to head
About

Duoreader

Read books and articles in two languages simultaneously, with sentence-by-sentence translations and audio support. Improve language skills naturally while enjoying literature and news. Supports custom imports and AI-powered explanations.

Highlights
  • Sentence-by-sentence bilingual translation
  • AI-powered dictionary
  • Advanced text-to-speech with multiple voices
  • Import custom ePUB and PDF files
  • Wide range of classic and modern texts
  • Supports multiple languages
Features
Read full description

Duoreader makes it easy to read bilingual texts by aligning translations sentence-by-sentence. You can enjoy the beauty of the originals while improving your language skills naturally. Read anything you want Free, with no ads. Duoreader translates what you read as you go. Whether the text has a human translation or not, you always read it side by side in two languages. Word-by-word alignment Tap a sentence to line up both versions word by word and see exactly which phrase maps to which. AI dictionary Tap any word for a definition that fits the sentence you are reading. Text-to-speech (TTS) and read aloud Listen with natural voices and adjustable speed, and follow along as the text highlights. 78 classic books, in 11 languages Translations into Chinese, English, French, German, Spanish, Italian, Arabic, Japanese, Russian, Korean and Polish. Austen, Dickens, Orwell, Hemingway and more — read them as they were translated, or let Duoreader translate for you. 1,400+ websites, 24 languages Browse by topic — news, science, tech, health, culture, history, travel, food, sport, finance and more — and read any article in your own language, even where no translation exists yet. Prefer a site of your own? Paste the URL. Import your own books Import your own ePUB and PDF files and read them the same way, with bilingual reading, dictionary and TTS. Library and bookmarks Filter by level and language, and save a bookmark on any paragraph to come back to it later. Your progress and bookmarks sync across devices when you sign in. Duoreader supports many languages including Chinese, English, French, Spanish, Italian, Japanese, Arabic, and Russian, with more to come. Bring your favorite books, read something new every day, and learn languages naturally — all within Duoreader.

About

Learn Languages

Practice writing in a new language with AI-powered feedback. This app helps you improve fluency and confidence by correcting your journal entries and showing you how your writing develops over time. It offers a private space to learn and grow your language skills.

Highlights
  • AI-assisted writing corrections
  • Daily journaling in target languages
  • Fluency and confidence building
  • Comparison of original and corrected entries
  • Secure and private data storage
  • Supports multiple languages
Features
Read full description

LangDiary is a thoughtful journaling app that helps you improve your writing skills in a new language through daily practice and AI-assisted feedback. Instead of writing in your native language, you express your thoughts in the language you are learning and increase both your fluency and confidence. After submitting your submission, LangDiary provides AI-driven corrections that highlight errors and offer clear suggestions for improvement. There are no real-time prompts or auto-corrections, so you can write freely and naturally without interruption. Once checked, you can compare your original input with the corrected version to see how your writing develops over time. LangDiary supports German, Dutch, Italian, French, Spanish and English. Your entries are securely stored on your device and privately synced to iCloud - only you can read them. If you choose to receive corrections, your submission is shared anonymously and only for correction. LangDiary creates a safe, private space where you can improve your language skills - one journal entry at a time. Start writing in your target language and take your writing skills to the next level. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kiru.io/app/langdiary/privacy/

Screenshots

Duoreader4 screens
Learn Languages4 screens

Verdict

The call

The clearest difference is in-app purchases: Duoreader at none against Learn Languages's 3. Duoreader also leads on ratings volume (22 vs 4) and iOS requirement (15.0 vs 18.0). Learn Languages's advantage is review sentiment (75% vs 63%). On price, rating, update cadence and ads 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. Learn Languages sells 3 in-app purchases, starting at $0.99 per 7 days. Duoreader asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Duoreader holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Duoreader has 22 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 63% of Duoreader's written reviews are positive against 75% of Learn Languages's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Duoreader ships an update every 2 months, Learn Languages every 5 weeks. The most recent releases landed on November 3, 2026 and October 18, 2026 respectively.

Scorecard5 real differences · 5 level
Duoreader versus Learn Languages: the parameters behind the verdict, then further details
ParameterDuoreaderLearn Languages
PriceFreeFree
Rating4.2 (22 ratings) — better4.0 (4 ratings)
Positive reviews62.5% of reviews75.0% of reviews — better
Number of ratings22 — better4
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size64 MB15 MB
Age rating12+4+
DeveloperXing ChenKirusanth Schenkenberg van Mierop

Customer experience

Duoreader

All ratings20 ratings
Positive80.0%
Neutral5.0%
Negative15.0%
Written reviews8 reviews
Positive62.5%
Neutral12.5%
Negative25.0%

Learn Languages

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

Duoreader

No in-app purchases

3 purchases

Learn Languages

Subscriptions3
  • Weekly$0.997 Days
  • Pro3 Days trial$1.997 Days
  • Pro7 Days trial$9.991 Year

Questions

Is Duoreader free?
Duoreader is free to download, with no in-app purchases.
Is Learn Languages free?
Learn Languages is free to download, with in-app purchases available.
Which has better reviews, Duoreader or Learn Languages?
Duoreader is rated higher. Duoreader averages 4.2 out of 5 from 22 ratings, while Learn Languages averages 4.0 from 4 ratings.
Do Duoreader or Learn Languages have ads?
Neither Duoreader nor Learn Languages shows ads.
Which is updated more often, Duoreader or Learn Languages?
Duoreader ships an update every 2 months, and Learn Languages every 5 weeks. Most recently, Duoreader was updated on November 3, 2026 and Learn Languages on October 18, 2026.

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