Radical vs Bunchuu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Radical
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Most Japanese apps just tell you what a kanji means and ask you to memorize it. Radical teaches you why — and that changes everything. The thing nobody explains: phonetic radicals About 80% of kanji are 形声文字 (けいせいもじ、phono-semantic compounds). That means they have two components: one that hints at meaning, and one that predicts the on'yomi reading. Most learners are probably already aware of meaning radicals, which are mostly just called “radicals”. For example, take 語 (the 語 in 日本語「にほんご」, Japanese language), 話 (話す「はなす」, to speak), 読 (読む「よむ」, to read). They all contain 言, which signals "language/speech”, because it’s the image of a mouth (口) out of which words come out). That's the meaning radical doing its job. Think about it. You probably know the kanji 五, read ゴ and meaning “five”. And you know the 語 in 日本語. It makes sense that 語 (the suffix for language) has the meaning radicals 言 (to say) and 口 (mouth). But why 五 (five)? How does 語 have to do anything with “five”? This is because 五 is never a meaning radical, but a phonetic radical. Phonetic radicals will give you the on’yomi reading (the reading you use when two kanji are together). Now look at 五, 語, 悟 and 吾. They all contain 五 as a phonetic radical, and they all share the reading ゴ. Once you learn 五 reads ゴ, you can read a whole cluster of kanji you've never seen before. Radical was created by Carlos Ramos Fuentes, teacher of Japanese, because no existing app was teaching the real structure of kanji. WaniKani invents mnemonics. Duolingo skips kanji depth entirely. Radical gives you the actual system. What Radical includes -A full English-Japanese dictionary with 210,641 words, 6,368 kanji, 246,737 example sentences, and 9,756 JLPT tags, all searchable in English, Japanese, romaji, hiragana, or katakana. -For every kanji, Radical shows you its meaning radical (what it means) and its phonetic radical (how to read it when it appears next to another kanji). It handles reading exceptions too (the cases where the pattern breaks) with a clear explanation of why. -A vocabulary list where you save words from the dictionary, track mastery with a 5-star system, and quiz yourself with typing and recall modes. A kanji list organized by meaning radical and phonetic radicalso you can see the structural patterns that connect them and do quizzes to raise their mastery to 5 stars. -Courses: start with Understanding Radicals, a free mini-course that explains the whole system with a certificate on completion. Then move into the JLPT N5 Kanji course, which covers every kanji you need for N5 with structured lessons, reading exception explanations, and a mastery-to-certificate progression. -A streak, study stats, and JLPT-level progress tracking to keep you moving. Who Radical is for You've been studying Japanese for a while but kanji still feels like memorizing random symbols. You've tried Duolingo or Anki but stalled. You want to understand kanji, not just collect flashcard streaks. You're working toward JLPT N5 or higher and want a method that scales. Data sources: JMDict, KANJIDIC, Tatoeba, Ishizawa-sensei's phonetic radical research, and the author's own academic work on kanji acquisition through phonetic radicals. Made by Carlos Ramos Fuentes, teacher of Japanese at CarlosCoordinator.com. If you're looking for live Japanese classes, from fluency development to JLPT N1, I'm here to help: https://zcal.co/carloscoordinator/japanese. You can also find your dream internship in Japan at JapanIntern.Net. My new JLPT N1/N2 Prep Course is out! Check it out and get the first class for free at https://carloscoordinator.com/course. At my language academy, we also teach Spanish, English & Chinese. If you'd like to book a free trial class, you may set it up here: https://zcal.co/carloscoordinator/discoverycall
Bunchuu
This app enhances language learning by providing real-world context for vocabulary and kanji. It offers customizable study sessions, offline access, and seamless synchronization with an existing learning platform. Enjoy a visually appealing and private study experience.
- Vocabulary in context with furigana
- Customizable study and review sessions
- Offline access and progress syncing
- Visual progress tracking
- Private study with no tracking
- Dark mode support
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Bunchuu is a beautiful, fast, native companion app for WaniKani. Do your lessons and reviews anywhere — then go further, and meet every kanji where it lives: in real sentences. VOCABULARY IN CONTEXT Real context sentences for every vocabulary item. Furigana readings and plain-English grammar notes, one tap away. Translations stay veiled until you ask, so you can test yourself first. YOUR STUDIES, YOUR PACE Hand-pick exactly which radicals, kanji, and vocabulary to learn next. Review in batches, choose the ordering, and ask meaning and reading back to back — or far apart. Typo tolerance, your own synonyms, an automatic kana keyboard, and a leech threshold you control. WANIKANI'S SRS, SYNCED Works fully offline — lessons, reviews, and every mnemonic are cached on your device, and progress syncs when you're back online. Your progress lives in your WaniKani account, so you can switch between Bunchuu and the website at any time. Accuracy, streaks, and review history for every item. WATCH YOUR PROGRESS RISE Every level and every SRS stage, at a glance. Get notified the moment reviews are ready. A DELIGHTFUL PLACE TO STUDY A watercolor world, from the radicals to the snack breaks. Beautiful enough to make reviews feel like a treat. Full dark mode. PRIVATE BY DESIGN No Bunchuu account, no analytics, no tracking. Your study data syncs directly between your device and your WaniKani account. Bunchuu requires an active WaniKani account (wanikani.com). WaniKani's free trial covers its first three levels, so you can try both together. Bunchuu is an unofficial third-party app and is not affiliated with WaniKani or Tofugu, LLC.
Screenshots
Verdict
The clearest difference is in-app purchases: Bunchuu at none against Radical's 1. On price, update cadence, ads 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. Radical sells 1 one-off in-app purchase. Bunchuu asks for nothing beyond the download.
Radical ships an update every 11 days, Bunchuu every 2 weeks. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.
| Parameter | Radical | Bunchuu |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 11 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlos Ramos Fuentes | Four Skills Labs, LLC |
In-app purchases
Radical
- JLPT N5 Kanji Course$4.99
Bunchuu
No in-app purchases









