ことわざ・四字熟語 学習小辞典 vs Nihongo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ことわざ・四字熟語 学習小辞典
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ことわざ・故事成語4369語(意味)、四字熟語3072語(意味/同・類義語)、三字熟語640語(意味)、難読漢字(読み)2040語と、無料アプリとしては圧倒的なボリュームのコンテンツを収録したシンプルな学習小辞典です。日常生活の中で知らないことわざや四字熟語が出てきた時に、すぐに意味を調べられます。また「四字熟語」では、漢検2級、準1級、1級に対応する熟語を網羅しました。 それぞれ、「辞書モード」と「クイズモード」を用意しました。クイズモードでは、意味から成語を知るための「逆引き辞典」や「書き取り練習」のように使える他、みんなが集まった時にワイワイと雑学知識を披露しあって楽しむこともできます。 学習に便利なブックマーク登録機能も備えています。 百人一首、旧暦換算、英語ことわざ、二十四節季、七十二候、旧国名・都道府県対照表、ABC略語、間違いやすい日本語表記、モノの数え方辞典等を付録として収録しています。 ※広告表示が邪魔に感じられる方には、有料(100円)の「広告なし版」をおすすめします。
Nihongo
This app is an offline Japanese study tool that functions as a dictionary, translator, and flashcard creator. It helps users learn Japanese by analyzing text from their surroundings, such as signs and menus, and creating personalized study materials.
- Offline Japanese dictionary
- Picture-to-text translation (OCR)
- Automatic flashcard creation
- Reading assistant with furigana/romaji
- Spaced repetition flashcards
- Search in English, Japanese, or romaji
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Nihongo is an offline Japanese dictionary, picture-to-text translator, flashcard app, and reading assistant. Our app helps you learn Japanese naturally, using the words you encounter in daily life—on menus, signs, manga, emails, books, and more. In addition to the dictionary, you can take a picture of Japanese text or paste it from any source. Nihongo will then translate the text, add furigana or romaji, and create flashcards so you can study and steadily build your vocabulary. Here are the complete features of the app: DICTIONARY * Over 200,000 words, 205,000 example sentences, and 6000 kanji entries. * Every word clearly marked as common, uncommon, or rare. * Add your own notes to any dictionary entry. * Quickly identify transitive/intransitive word pairs. * Audio pronunciations of words and example sentences (Requires Nihongo Pro) PHOTO LOOKUP (OCR) [Pro] * Look up words just by taking a picture. * Uses Google Cloud Vision to provide high-quality text recognition. * Just tap on a word to look it up. CLIPPINGS (READING ASSISTANT) [Pro] * Adds furigana or romaji to text pasted into the app. * Tap on any word to see its definition without leaving the clipping. * Flashcard deck automatically created so you can study the new words in a clipping. * Display text horizontally or vertically. * Have Nihongo read any clipping out loud. FLASHCARDS [Pro] * Flashcards automatically generated from words you lookup in the dictionary or paste into the app. * Nihongo learns what words you know, and won't bother you again with words you've mastered. * Built-in kanji flashcard decks up through Middle School. * Intuitive spaced repetition flashcard system for vocabulary and kanji drawing. * Level up flashcards by studying every day. * No penalty for missing a day of study, come back anytime. SEARCH * Search using English, Japanese, or romaji. * Supports searching for conjugated words in both English and Japanese. * Search for kanji using radicals and stroke counts. SAFARI EXTENSION [Pro] * Add furigana or romaji to webpages. * Tap on words to see definition within Safari. Nihongo Pro Terms of Use Read our full Terms of Service at https://nihongo-app.com/terms_of_use.html. This app is only possible because of the JMDict (edrdg.org) and Tatoeba (tatoeba.org) projects. I highly encourage you to support these incredible projects that make apps like Nihongo possible!
Screenshots
Verdict
The clearest difference is in-app purchases: ことわざ・四字熟語 学習小辞典 at none against Nihongo's 6. ことわざ・四字熟語 学習小辞典 also leads on rating (5.0 vs 4.8) and review sentiment (100% vs 91%). Nihongo's advantage is ads (none vs shown) and update cadence (weekly vs every 4 months). On price and device support 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. Nihongo sells 5 in-app purchases, starting at $4.99 per month. ことわざ・四字熟語 学習小辞典 asks for nothing beyond the download.
ことわざ・四字熟語 学習小辞典 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Nihongo has 1.9K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of ことわざ・四字熟語 学習小辞典's written reviews are positive against 91% of Nihongo's.
ことわざ・四字熟語 学習小辞典 ships an update every 4 months, Nihongo weekly. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.
| Parameter | ことわざ・四字熟語 学習小辞典 | Nihongo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.8 (1.9K ratings) |
| Positive reviews | 100.0% of reviews — better | 91.3% of reviews |
| Number of ratings | 1 | 1.9K — better |
| Update frequency | Every 4 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 13 MB | 493 MB |
| Age rating | 4+ | 4+ |
| Developer | Mejiro Publications | Serpenti Sei Japan |
Customer experience
ことわざ・四字熟語 学習小辞典
Nihongo
Bugs and requests
ことわざ・四字熟語 学習小辞典
Not enough reviews yet to summarise bugs or requests.
Nihongo
Reported bugs
3 issues- Freezing issues when tapping on kanji
- Font size problems
- Inconsistent OCR and translation accuracy
Requested features
5 requests- Handwriting input support
- Customizable flashcard settings
- Monolingual dictionary feature
- Improved backup and sync functionality
- Statistics and progress tracking
In-app purchases
ことわざ・四字熟語 学習小辞典
No in-app purchases
Nihongo
- Nihongo Pro (Monthly)7 Days trial$4.991 Month
- Nihongo Pro (3 Months)7 Days trial$11.993 Months
- Nihongo Pro (Annual)7 Days trial$49.991 Year
- Pitch Accents$9.99
- Nihongo Pro (Lifetime)2 variants$179.99







