# Tsugi - Japanese Vocab Mining — Smart n+1 Sentence Flashcards

> AI-powered Japanese sentence mining and spaced repetition flashcards. (iPhone/iPad app by Dittman Shum.)

- Source: https://appshunter.io/ios/app/tsugi-japanese-vocab-mining/id1546470961 (this page in markdown: same URL + `.md`)
- Developer: [Dittman Shum](https://appshunter.io/developer/1492526802)
- Category: Education, Reference
- Price: Free with in-app purchases
- Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 116 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 24 more
- Released: 2021-02-02
- Data updated: 2026-08-25
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/tsugi-japanese-vocab-mining/id1546470961/reviews.md

## What is Tsugi?

Tsugi (次) is the next-generation AI Japanese immersion and sentence mining platform. Built for intermediate to advanced learners who have outgrown basic language apps, Tsugi turns native Japanese content into your own personalized, high-yield Spaced Repetition System (SRS) study ecosystem. Whether you’re studying for the JLPT or pursuing real-world fluency, Tsugi helps you learn from authentic Japanese.

Key Features:

- AI-Powered n+1 Sentence Mining: Automatically analyze any complex Japanese sentence. Tsugi identifies the exact grammar patterns and vocabulary matching your current level, instantly isolating the single unknown word (n+1) for highly efficient acquisition.

- Instant Text Analysis & Local Tokenization: Powered by lightning-fast, privacy-first local processing, our advanced tokenizer instantly breaks down native sentences into nouns, verbs, particles, and conjugations with precise definitions.

- Super-Charged SRS Algorithm: Move past rigid legacy apps. Our optimized spaced-repetition engine adapts dynamically to your personal forgetting curve, resurfacing weak cards right before you forget them.

- Native Audio & Interactive Furigana: Perfect your accent with high-quality audio output designed for pitch-accent training and shadow reading. Toggle furigana and hiragana overlays instantly based on your target Kanji comfort level.

- Comprehensive Progress Analytics: Track your journey toward true literacy. Visualize your vocabulary growth, card retention curves, and daily study streaks with deep statistical insights.

- Smart Reminders: Never break your streak. Customizable daily notifications ensure your reviews are cleared on time, keeping your SRS engine perfectly optimized.

- iCloud sync keeps learning progress, review history, and key settings in sync across your Apple devices.

- Built-in Dictionary Lookup: Look up words instantly with the privacy-first dictionary built into Tsugi.

Take the next step in your language journey. Move beyond gamified apps and start mining your way to true fluency with Tsugi.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- AI-powered n+1 sentence mining
- Instant text analysis and local tokenization
- Super-charged SRS algorithm
- Native audio and interactive furigana
- Comprehensive progress analytics
- Smart reminders

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Weekly Subscription | $0.49 | per 7 days |
| Premium Monthly Subscription | $0.99 | per month |
| Premium Annual Subscription | $4.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tip | $2.99 | one-time |
| Premium Lifetime | $10.99 | one-time |
| No Ads | $0.99 | one-time |
| Pro Lifetime | $19.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/tsugi-japanese-vocab-mining/id1546470961/reviews.md

### 5/5 — Clean, focused Japanese learning

*2026-07-05*

Tsugi is a really well-designed Japanese learning app that’s simple, fast, and free of clutter. The spaced repetition system helps me stay consistent, and the example sentences actually make it easier to understand real usage instead of just memorising words in isolation.

## Frequently asked questions about Tsugi

### What is Tsugi's learning methodology?

Tsugi employs an AI-powered n+1 sentence mining approach, identifying single unknown words within complex native Japanese sentences. It then uses a super-charged SRS algorithm to optimize vocabulary acquisition based on your personal forgetting curve.

### How does Tsugi track progress?

Tsugi offers comprehensive progress analytics, allowing you to visualize your vocabulary growth, card retention curves, and daily study streaks with deep statistical insights. This helps you monitor your journey toward true literacy.

### What are the subscription options for Tsugi?

Tsugi offers Premium Weekly ($0.49/P7D), Premium Monthly ($0.99/P1M with a 7-day free trial), and Premium Annual ($4.99/P1Y) subscription plans. These unlock advanced features for enhanced learning.

### Does Tsugi have ads?

No, Tsugi does not contain advertisements. The app is free to use with optional in-app purchases for premium subscription plans.

### What devices does Tsugi support?

Tsugi is available on iPhone and iPad, making it accessible for users on Apple's mobile and tablet platforms.

### How often is Tsugi updated?

The latest version of Tsugi is 6.30, last updated on July 16, 2026. This indicates a commitment to ongoing development and improvements.

### What age rating does Tsugi have?

Tsugi has an age rating of 4+, making it suitable for a wide range of users interested in learning Japanese.

### Can I use Tsugi offline?

The description mentions instant text analysis and local tokenization powered by privacy-first local processing, suggesting that core functionalities may be available offline. However, specific offline capabilities are not explicitly detailed.

## Version history (last 5 releases)

### 6.70 — 2026-08-23

• iCloud sync keeps learning progress, review history, and key settings in sync across your Apple devices.
• Tsugi now runs on Mac Catalyst.
• Detailed JLPT stats show words seen immediately, with a darker ring for words mastered after three successful reviews.

### 6.60 — 2026-08-09

• New Card Background theme: Terracotta joins Slate and Lavender as a premium option, alongside the free Sage and Parchment.
• Dictionary lookups now include Conjugations and Grammar tabs (Premium) for conjugatable words — see every form of a verb or adjective, and the grammar patterns it fits, without leaving the sheet.
• Words the dictionary doesn't recognize can now be conjugated too, via a manual word-type picker in the lookup sheet.

### 6.50 — 2026-07-30

• Tap any word on a flashcard to select it, then use the new dictionary button in the toolbar to look it up — defaults to the card's taught word if you haven't tapped one.
• New Card Background setting: choose from four themes. Sage and Parchment are free; Slate and Lavender are premium.
• Clearer flashcard highlighting: the taught word and the word you've selected now use distinct, easier-to-read colors instead of competing shades of the same accent.

### 6.40 — 2026-07-26

• Smarter review scheduling: intervals now grow based on an ease factor tuned to how well you know each card, instead of fixed steps.
• Next-sentence selection favors sentences with exactly one word you don't know yet, so every new card teaches you something without overwhelming you.
• AI-powered sentence breakdown: tap a card to see a word-by-word grammar breakdown, cross-checked against the sentence's translation.
• Part-of-speech tags in the dictionary sheet now wrap onto a new line instead of requiring a horizontal scroll.
• The JLPT level picker in Settings is now a compact menu.
• The default built-in dictionary is now clearly labeled "JMDict (Built-in)".

### 6.30 — 2026-07-16

Addicted in-built dictionary

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## More apps by Dittman Shum

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All apps by Dittman Shum: https://appshunter.io/developer/1492526802

## Related topics

[jlpt flashcard](https://appshunter.io/ios/topics/jlpt-flashcard) · [migaku](https://appshunter.io/ios/topics/migaku)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*