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.
App Overview
Kanji Lookup Pro
KanjiLookup Pro - the ultimate Kanji reference, simple, fast, and hassle-free!
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
55 ratings · Top 5%
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 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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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Kanji Lookup Pro: map the core Reference 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 more diverse examples and usage contexts.
Assumption to check: Limited kanji examples for context.
Validate with people who use this workflow before building.
Hypothesis 2
Improve onboarding and navigation guides.
Assumption to check: Difficult navigation for new users.
Validate with people who use this workflow before building.
Hypothesis 3
Add forums or chat features for user interaction.
Assumption to check: Lack of community features for sharing knowledge.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search options to include radicals and strokes.
Assumption to check: Limited search functionality (e.g., no radical search).
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
KanjiLookup Pro - the ultimate Kanji reference, simple, fast, and hassle-free! KanjiLookup Pro is a Kanji reference that focusses on - and attempts to excel at - one thing: Finding the meaning of an unknown Kanji character as quickly and easily as possible, in the only way that really makes sense on a touch-enable device: by drawing it on your screen. Stop wasting your time counting strokes, deciphering radicals, or learning the intricacies of 'well-designed' lookup schemes - simply start drawing the character and watch results appear instantaneously. KanjiLookup Pro does not clutter your results with obscure readings only found in the name of that one mountain village or cross-references to paper dictionaries you most likely don't own anyway. Instead, it simply shows you what you are looking for: The character's pronunciation and definition. In addition, a searchable list of the most relevant words containing the Kanji character is only a tap away - along with beautifully animated stroke-order diagrams, definitions, synonyms, and much more. KanjiLookup Pro even allows you to export stroke order diagrams so that you can perfect your penmanship, making Kanji Lookup the ideal study companion. KanjiLookup Pro was designed from the ground up for minimal start-up time, nearly instantaneous handwriting recognition, and a clean interface that doesn't get in your way. It currently contains information for over 3500 Kanji, including but not limited to all the Joyo and Jinmeiyo characters. Synonyms and definitions are currently in Japanese only.
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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
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
Supabase
Zustand
react-native-gesture-handler
react-native-reanimated
BUILD KIT DIFFICULTY
Advanced
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.
