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
MyJapan Travel
- MyJapan helps you discover inspiring places across Japan and turn them into a trip plan
$0.99
PRICE
$0.99
No 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.
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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 included
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 MyJapan Travel: map the core Travel 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
Integrate user reviews and ratings for attractions.
Assumption to check: Users often struggle to find reliable travel information.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a drag-and-drop itinerary planner.
Assumption to check: Difficulty in managing trip itineraries effectively.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance messaging with multimedia support.
Assumption to check: Limited in-app messaging functionality.
Validate with people who use this workflow before building.
Hypothesis 4
Utilize AI to suggest tailored travel experiences.
Assumption to check: Lack of personalized recommendations.
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
- MyJapan helps you discover inspiring places across Japan and turn them into a trip plan. - Browse curated destinations with photos, search by name or area, save your favorites with a tap, and explore spots on a map to shape your itinerary. - You can also use the built-in AI trip planner to generate travel ideas by answering a few quick questions. [Key Features] - Explore: Browse and search curated destinations with photos - Map Planner: View destinations on a map and plan where to go next - Favorites: Heart the places you love and revisit them anytime - AI Trip Planner: Get itinerary ideas from a short Q&A [Perfect For] Choosing where to go on your next Japan trip Planning efficiently with a map-first view Building a personal list of must-visit places
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 Navigation
native-base
react-query
axios
Expo
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
