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
Japan Eats
Japan Eats helps you decide what to eat in Japan.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included14 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.
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 Japan Eats: map the core Food & Drink 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
Expand restaurant partnerships and include user-generated suggestions.
Assumption to check: Limited restaurant options in certain areas
Validate with people who use this workflow before building.
Hypothesis 2
Improve logistics and real-time tracking for better transparency.
Assumption to check: Long delivery times reported by users
Validate with people who use this workflow before building.
Hypothesis 3
Enhance search and filter capabilities for easier navigation.
Assumption to check: Difficulty in finding specific cuisines
Validate with people who use this workflow before building.
Hypothesis 4
Introduce loyalty rewards and promotional campaigns to attract more users.
Assumption to check: Lack of promotional offers
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
Japan Eats helps you decide what to eat in Japan. Explore a photo-rich guide to 480+ Japanese dishes, drinks, sweets, and regional favorites. Each item includes a short, readable description, Japanese name, key ingredients, and how it is usually served — so you can recognize dishes on menus and order with more confidence. When you find something you want to try, use Find Nearby to open Apple Maps or Google Maps with a dish-specific search. FEATURES • Visual catalog of 480+ Japanese foods and drinks • Ramen, sushi, soba, udon, donburi, izakaya dishes, yakitori, sweets, teas, and more • English and Japanese dish names with short descriptions • Find Nearby: search Apple Maps or Google Maps by dish • Show the Chef: display simple table requests such as no spice or double portion • Useful for travel, restaurants, food courts, markets, and menu browsing LANGUAGES English, 日本語, Русский, 简体中文, 繁體中文, Português (BR), Español (MX), 한국어, ไทย, Tiếng Việt, Bahasa Indonesia, العربية, Français (FR) Note: Map availability and search results may vary by location and time.
Written user reviews are not shown here. Check current App Store reviews >
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
react-navigation
axios
react-native-maps
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.
