A単 vs Dunno
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A単
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英和辞書です。30万語以上収録。 地下鉄・飛行機の中など、インターネット接続ができない場合でも使えます(オフライン辞書)。海外旅行・海外出張などで、現地でデータ通信をしたくない・できない場合でも使えます。 アプリ内課金もありません。 単語をタップすると英語で発音します。
Dunno
This app serves as an intelligent English learning assistant, offering comprehensive dictionary functions, translation capabilities, and tools to improve vocabulary and grammar. It features offline access, voice and image lookup, pronunciation guides, and error checking to enhance English proficiency.
- Offline English dictionary
- English to 89 languages translation
- Grammar lookup by levels
- Voice and image word lookup
- Audio pronunciations (British/American)
- Grammar error checking
- Vocabulary notebook with flashcards and quizzes
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Look up any English word, translate text or photos, and hear how it's actually pronounced — online or offline. Dunno is more than a dictionary. It's a complete English learning assistant: 350,000 words, grammar organized by CEFR level, camera and voice translation, pronunciation scoring, and your own vocabulary notebook with flashcards and quizzes. LOOK UP ANYTHING, ANYWHERE - Full offline dictionary — words, grammar, prepositions, sentence patterns, images - Autocomplete predicts the word as you type - Search by voice, or point your camera at a word and get the meaning instantly - Every entry includes definitions, examples, word forms, synonyms, antonyms and related words - Audio pronunciation in both British and American English TRANSLATE 89 LANGUAGES Two-way translation for text, photos and full sentences — Spanish, French, Chinese, Japanese, Korean, Vietnamese and 80+ more. PERFECT YOUR PRONUNCIATION Record yourself, compare it with a native speaker, and get instant feedback on exactly what to fix. CHECK YOUR GRAMMAR Paste any sentence to catch spelling and grammar mistakes, with a clear explanation of every correction. GRAMMAR BY LEVEL 127 grammar topics organized from A1 to C2, so you always know what to learn next. YOUR VOCABULARY NOTEBOOK - Save any word with one tap - Review with flashcards and quizzes so words actually stick - Ready-made lists: 3,000 TOEIC words, plus IELTS, TOEFL and SAT sets - Word lists by field of study and difficulty level - Track how many words, sentences and grammar points you've mastered - Keep studying on your lock screen in spare moments PRACTICE FOR THE TEST Full TOEIC mock tests with answer keys and detailed explanations for every question. ASK THE COMMUNITY Stuck on a sentence? Post it and get answers from other learners. BY THE NUMBERS - 350,000 English words - 418,000 examples and illustrations - 127 grammar lessons, A1 to C2 - 89 translation languages Also available on the web at http://dunno.ai Privacy Policy: https://dunno.ai/other/privacy-policy Terms of Use: https://dunno.ai/other/term WE READ EVERY MESSAGE Send ideas, bug reports or feature requests to eup.mobi@gmail.com — thank you!
Screenshots
Verdict
The clearest difference is in-app purchases: A単 at none against Dunno's 10. A単 also leads on ads (none vs shown). Dunno's advantage is update cadence (fortnightly vs every 12 months). On price, device support and iOS requirement 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. Dunno sells 10 in-app purchases, starting at $6.49 per 3 months. A単 asks for nothing beyond the download.
A単 ships an update every 12 months, Dunno fortnightly. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.
| Parameter | A単 | Dunno |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (30 ratings) — better |
| Positive reviews | — | 90.5% of reviews |
| Number of ratings | — | 30 — better |
| Update frequency | Every 12 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 18 MB | 196 MB |
| Age rating | 4+ | 4+ |
| Developer | Jazz Soft, Inc. | Linh Nguyen |
In-app purchases
A単
No in-app purchases
Dunno
- Basic version [-50%]$6.493 Months
- Basic version [-40%]$7.493 Months
- Standard version [-50%]$8.491 Year
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- Basic version [-30%]$8.993 Months
- Standard version [-40%]$10.491 Year
- Standard version [-30%]$11.991 Year
- Premium version [-50%]$9.99
- Premium version [-40%]$11.99
- Premium version [-30%]$13.99
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- Premium version$19.99









