Mugi vs KotobaFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mugi
This AI-powered companion helps you deeply understand Japanese sentences from various sources like anime, dramas, or study materials. It provides detailed analysis, including word segmentation, grammar identification, and translation, with features like OCR and pronunciation.
- AI deep syntactic analysis
- Word segmentation and part-of-speech tagging
- Grammar and sentence pattern recognition
- OCR for text recognition from images/screenshots
- Native pronunciation playback
- Vocabulary notebook with spaced repetition
- Customizable AI model integration
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Mugi 是你学日语的 AI 精读伙伴。 无论是阅读动漫对话、日剧字幕，还是备考 JLPT，Mugi 都能帮你逐句拆解——比字典更深，比翻译 App 更聪明。 【AI 深度句法分析】 粘贴或输入任意日语句子，一键解析： · 单词分词 + 词性标注 · 谓语结构分析（主谓宾、助词关系） · 句子成分可视化 · 文法句型识别（涵盖 N1～N5 常见语法点） · 整句中文翻译 【拍照 / 截图直接识别】 对准教材、图片或屏幕截图，OCR 自动识别日文，无需手动输入，分析立即开始。 【原声朗读】 点击任意词语或整句，即可听到标准日语发音。支持系统 TTS 及 Azure 多种语音引擎。 【生词本 + 间隔重复】 遇到不认识的词？一键收录。生词本支持「待复习 / 学习中 / 已熟悉」三阶状态管理，科学安排复习节奏。 【多模型 AI，用你自己的 Key】 支持豆包、智谱等主流 AI 服务。可接入自己的 API Key 无限分析，或直接享用每日 20 次免费额度。 【每日免费额度】 AI 分析和语音朗读各提供每日 20 次免费使用，零成本体验全部核心功能。
KotobaFlow
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KotobaFlow 是一个面向日语初学者的句子填空练习工具。它把句型、助词、词形和五十音练习整理成简洁的每日训练，让你通过输入完整答案来真正写会常用表达。 主要功能： - 每天少量句子训练，适合作为长期复习节奏 - 看中文输入日文，强化助词、词形和语序 - 五十音拼写练习，帮助熟悉假名和键盘输入 - 错题、待复习和已掌握状态，方便回看薄弱内容 - 可使用系统语音朗读，部分核心内容内置高质量音频 - 无账号、无广告，学习记录保存在本机 适合正在入门日语、准备 N5/N4 基础语法，或希望把常见句型练到能写出来的学习者。
Screenshots
Verdict
The clearest difference is update cadence: Mugi at daily against KotobaFlow's every 3 months. Mugi also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Mugi ships an update daily, KotobaFlow every 3 months. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Mugi | KotobaFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Daily — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 94 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | 业锋 王 | 明昊 赫 |
In-app purchases
Mugi
No in-app purchases
KotobaFlow
No in-app purchases
