App Overview

GENKI Conjugation Cards icon

GENKI Conjugation Cards

The Japan Times Publishing, Ltd. · Education

Firmly master the conjugation of Japanese verbs and adjectives!

$6.99 · In-app purchases

PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
2.7
21 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.

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What's included16 files

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

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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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.

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> SELECT BUILD PLATFORM:

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

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

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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

Include user-generated content or community features to expand card library.

Assumption to check: Limited number of cards available for learning.

Validate with people who use this workflow before building.

Hypothesis 2

Implement a consistent design system for a unified experience.

Assumption to check: Inconsistent user interface across screens.

Validate with people who use this workflow before building.

Hypothesis 3

Provide detailed feedback and explanations for quiz answers.

Assumption to check: Limited feedback on quiz performance.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to download cards for offline study.

Assumption to check: No offline functionality.

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

Firmly master the conjugation of Japanese verbs and adjectives! This app helps you to master the conjugation of elementary verbs and adjectives through practice at your own pace. This is the official iPhone app for GENKI: An Integrated Course in Elementary Japanese, a best-selling series of Japanese learning materials boasting more than 3.5 million copies sold. *This app will not play audio if your device is in Silent mode (Vibrate mode). To hear the audio, please turn Silent mode off. Advantages •You can view the cards and listen to the recordings as you like, enabling you to study at your own pace. •The different conjugations are mastered through two types of practice: saying the conjugated forms aloud or typing them. •All conjugation forms studied at the elementary level are covered: 18 for verbs and 10 for adjectives •As you go through each conjugation card deck, the cards answered correctly are automatically removed, allowing you to efficiently focus on the trickier words in the next round of practice. Study methods Study: Practice each word by looking at the cards and repeatedly saying the conjugated forms aloud. (1) Each card has a word and the conjugation type to be practiced. Say the word in the conjugated form indicated. (2) Tap the sound icon to check whether you said the conjugated form correctly. (3) Tap the * icon to check the conjugated form in writing. (4) Study the use of the conjugated form by referring to the example sentence and illustration on the back side of the card. (5) Tap the Rule icon to see the conjugation rule. Check: Test your retention of each conjugated form by typing in your answers.* (1) Type in the conjugated form as instructed. (2) If you entered the correct form, the card will be removed from the study set. Cards answered incorrectly or skipped will remain in the deck for further practice. *To study with the Check method, you will need to add a Japanese keyboard to your iPhone settings before starting. Handy features •List All conjugation forms of each word are listed in this feature, with the words arranged in a-i-u-e-o order. A check mark is displayed next to each conjugation form that has been mastered and the Study view card for each entry can be opened, allowing you to review the conjugations via the list. •Rule This feature lists the rules for all 28 conjugation types covered by the app, enabling you to quickly look up the way to form conjugations such as the passive, the causative, the causative passive, and the tricky te-form. •Shuffle Mode Activating this mode will cause the app to display the cards in the Study mode in random order, rather than the default order. Shuffling the deck will help you to more firmly master the material. •Tutorials The tutorials provide helpful lessons on how to add a Japanese keyboard and operate each function. —Ads: The app does not display any ads that might interfere with learning.

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Screenshots

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Build scope

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

Define the first version

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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.

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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.