App Overview

QUARTET Vocab & Kanji icon

QUARTET Vocab & Kanji

Hideki Hamada · Education

With this app you can practice vocabulary and kanji introduced in the textbook “QUARTET Intermediate Japanese across the Four Language Skills”

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.0
6 ratings · Below Average

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

Build your own version

Build Kit

Make this idea yours

A product spec, screen plans, and build steps for your coding agent.

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

JavaScript is required to complete mailbox verification.

Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for QUARTET Vocab & Kanji: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Expand vocabulary database and allow user-submitted words.

Assumption to check: Limited vocabulary compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Integrate spaced repetition for effective learning.

Assumption to check: No spaced repetition feature

Validate with people who use this workflow before building.

Hypothesis 3

Add gamification features like daily challenges and rewards.

Assumption to check: User engagement is low

Validate with people who use this workflow before building.

Hypothesis 4

Enable offline downloads for vocabulary and kanji for learning on-the-go.

Assumption to check: Lacks offline access

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

With this app you can practice vocabulary and kanji introduced in the textbook “QUARTET Intermediate Japanese across the Four Language Skills”. Using the app, you can practice the words and kanji anytime and anywhere! Number of words: 256 Number of kanji: 327 <Vocabulary> Word Dictionary: You can look up the words that you need to memorize. Each word has two different example sentences; one from the textbook and one that is not from the textbook. You can listen to native pronunciation by tapping on the example sentences. Additionally, tapping on any of the kanji that are introduced in the textbook, you will be brought to that kanji page of the kanji dictionary. Word Flash: You can learn words from English to Japanese, or vice-versa by using the flash cards. If you put a check mark on the words you have already memorized, the words will not appear again for more efficient learning of other words. Word Q: You can practice the words you memorized through quizzes. <Kanji> Kanji Dictionary: Readings and meanings of kanji are introduced. Also, the stroke order of each kanji are animated. Kanji Reading Q: You can take a quiz to practice the reading of kanji you have learned. Kanji Writing Q: You can actually practice writing the kanji by hand. If you want to learn to write well, you can practice writing the kanji by tracing over the kanji pattern. <Other> Vocabulary List: You can search for all words. When you tap on a word, you will be brought to the dictionary page for that word. Review Q: Words and kanji readings can be reviewed in a game with time limits. Settings: You can mute the sound. You can also check the version of the app and credits information. This app is based on the vocabulary and kanji from the textbook “QUARTET Intermediate Japanese across the Four Language Skills”. 中級日本語の教科書「カルテットVol.1」の単語と漢字が練習できるアプリです。このアプリで、いつでもどこでも単語と漢字の練習が可能になりました!(収録単語・漢字数:256語・327漢字) アプリには以下の機能があります。 <単語> ・単語辞書:わからない単語を調べることができます。教科書にはない例文もあり、タッチすることでネイティブが発音した音声を聞くことが可能です。また、「カルテット」で勉強する漢字が使われている単語は、その漢字をタッチすることで、漢字辞書のページに移動します。 ・単語Flash:フラッシュカードを使うように、日本語・英語、どちらからでも単語を覚えることができます。覚えた単語にチェックを入れると、その単語はそれ以降出なくなるので、効率的に勉強が可能です。 ・単語Q:単語Flashで覚えた単語を、クイズ形式で練習できます。 <漢字> ・漢字辞書:漢字の読み方や意味が書いてあり、書き順をアニメーションで確認することもできます。 ・漢字読みQ:覚えた漢字の読みをクイズ形式で練習できます。 ・漢字書きQ:実際に手で書いて漢字の練習ができます。上手に書きたい人のために、お手本をなぞって書く練習もできます。 <その他> ・単語リスト:全ての単語を検索することができます。単語をタッチすると、その単語の単語辞書のページに移動します。 ・ふくしゅうQ:単語と漢字の読みが制限時間のあるゲームで復習できます。 ・SETTINGS:音の有無を設定したり、バージョンやクレジットを確認できます。 ○本アプリは、『4技能でひろがる中級日本語カルテットI』に準拠しています。

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
React Navigation
React Query
@react-native-async-storage/async-storage
expo-av
BUILD KIT DIFFICULTY
Starter

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.