# Katsuyō: Japanese Verbs — Master JLPT verb conjugation

> Master JLPT verb conjugation (iPhone/iPad app by Amarsanaa Jargal.)

- Source: https://appshunter.io/ios/app/katsuyo-japanese-verbs/id6818793474 (this page in markdown: same URL + `.md`)
- Developer: [Amarsanaa Jargal](https://appshunter.io/developer/1481446475)
- Category: Education, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English, Mongolian
- Released: 2026-10-05
- Data updated: 2026-11-06

## What is Katsuyō?

Katsuyō (活用, "conjugation") teaches the system behind Japanese verbs, so you stop memorising forms one by one and start predicting them.

Every godan verb walks the same vowel rows: 書かない, 書きます, 書く, 書ける, 書こう. Katsuyō drills that pattern in short, game-like sessions until it is automatic, then brings each form back for review right before you would forget it.

LEARN THE SYSTEM
• 17 verb forms: polite, negative, past, te form, want-to, potential, volitional, ば and たら conditionals, imperative, passive and causative
• Godan, ichidan and the irregulars する and 来る, including the trap verbs that look ichidan but aren't (帰る, 入る, 走る…)
• Over 1,300 JLPT verbs from N5 to N1, plus N5 and N4 grammar points, each tied to the verb form it builds on (てもいい, たことがある, ながら…)
• Tap any form to see what it means and how this verb builds it, with audio for the word and its dictionary form

PLAY, DON'T GRIND
• Six drill games: multiple choice, match pairs, swipe-sort by verb class, chain ladder, pick the meaning, and a boss round at the end of every unit
• Sentence drills with context cues (昨日 → past, ください → te form)
• Streaks, XP, combos and a unit path that shows how far you've come

REMEMBER IT FOR GOOD
• Spaced repetition (FSRS) for every verb and form, so reviews arrive when they matter
• A mastery heatmap for each verb you study
• Furigana and romaji you can switch on or off, plus Japanese audio

MISTAKES, EXPLAINED
When you miss, tap "Why?" for a short explanation of what went wrong: the wrong vowel row, a missed sound change, the ichidan rule on a godan verb. Each week Katsuyō suggests a plan aimed at your weak spots.

IN ENGLISH OR MONGOLIAN
Choose English or Монгол in Settings: meanings, explanations, grammar notes and sentence translations all follow.

FREE. NO ADS. NO ACCOUNT. FULLY OFFLINE.
Your progress stays on your iPhone. Katsuyō collects no data and never connects to the internet.

Dictionary data: JMdict (EDRDG, CC BY-SA 4.0). JLPT level tags are unofficial; Katsuyō is not affiliated with the Japan Foundation or JEES.

## Is Katsuyō safe?

Not enough ratings yet to assess Katsuyō.

## Is Katsuyō legit?

Katsuyō: Japanese Verbs appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Katsuyō is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.1.3 — 2026-10-22

• New game: Pick the Meaning. See a verb and pick what it means, or see a meaning and pick the verb. After you answer, every option shows its own word, so each question rehearses four verbs.
• Kana Trace is taking a break for now.

### 1.1.2 — 2026-10-21

• Kana Trace now uses a smaller 4×4 board: fewer kana to scan and bigger tiles to tap

### 1.1.1 — 2026-10-11

• Learn cards now show each new form's meaning, how to read it (kana and romaji) and a speaker to hear it, in English or Mongolian
• Tap a form on a learn card to see what it's for, how it's built and an example sentence
• Long verbs like 待ち合わせる now fit on one line

### 1.1.0 — 2026-10-06

• N3, N2 and N1: over 1,000 new verbs, from 冷ます to 試みる, in new units that drill every form
• Монгол хэл: choose English or Mongolian in Settings. Meanings, explanations and sentence translations all follow
• Tap a form on a verb page or a lesson to see what it means and how it's built, and hear it

### 1.0.0 — 2026-10-05

No release notes.

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## Related topics

[japanese verb conjugation](https://appshunter.io/ios/topics/japanese-verb-conjugation)

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