Kotoba Deck vs KotobaBloom
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Kotoba Deck
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The Japanese vocabulary of Shotokan karate. You hear the words every class โ but where do you actually look them up? Kotoba Deck puts the language of the dojo in your pocket: counting, commands, stances, blocks, strikes, kicks, and etiquette, each with romaji, kanji, a clear pronunciation, and an English meaning.
KotobaBloom
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Speak Japanese that belongs in real life. Kotoba Bloom is an AI Japanese learning app for people who want to live, work, travel, and connect in Japan, and for everyone who loves Japanese culture. TALK WITH AI Practice guided chat, sentence recording, native-style listening, and low-latency live AI conversation. Choose cafes, stations, friends, interviews, meetings, or culture. The coach adapts speed, politeness, and the next question to your level. SOUND NATURAL, NOT TEXTBOOK Get a corrected sentence, a more natural version, grammar guidance, pronunciation targets, culture and register notes, a score, and one clear next drill. Learn when a casual anime-like expression is fun, when it may sound rude, and what Japanese people would usually say instead. BUILD YOUR OWN PATH Choose Work in Japan, Love Japan, Travel Japan, JLPT, Daily Conversation, or a mixed goal. AI Growth Memory uses completed lessons, mistakes, speaking practice, and missions to recommend the next useful step. CAREER IN JAPAN Train self-introductions, interviews, strengths, motivation, keigo, email, meetings, reporting, workplace small talk, and Japanese business culture. Sensei Pro adds deeper professional role-play and feedback. JAPAN CULTURE WORLD Learn through original missions inspired by travel, food, festivals, shrines, hot springs, convenience stores, games, manga, anime, friendship, and everyday life without copying copyrighted dialogue. CORE SKILLS โข Essential high-frequency Japanese words โข Listening and shadowing with AI-generated Japanese voice โข Microphone speech recognition and sentence-match feedback โข Kana and kanji writing practice โข Personal weekly plans, streaks, rewards, and Bridge Missions โข Progress evidence and Japan Bridge Certificate โข Eight interface languages PLANS Free Sakura offers the foundations with limited AI use and light sponsor breaks after learning. Kotoba Plus expands AI conversation, listening, culture, and daily practice. Sensei Pro adds intensive career, interview, business, JLPT, and expert coaching. Paid plans are ad-free. Kotoba Bloom is built to help every learner communicate with confidence, understand the culture behind the words, and create more human connection between Japan and the world. Terms: https://kotobabloom.com/terms.html Privacy: https://kotobabloom.com/privacy.html
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Verdict
Kotoba Deck and KotobaBloom are too close to call on the numbers: across 5 compared parameters โ price, ads, in-app purchases and device support among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Kotoba Deck | KotobaBloom |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 25 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Computerist Solutions, Inc | RIKUYA SATO |
In-app purchases
Kotoba Deck
No in-app purchases
KotobaBloom
No in-app purchases









