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
Sakura Spots Japan
Discover Japan’s Best Cherry Blossom Viewing Spots
$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.
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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 included15 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 Sakura Spots Japan: 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
Incorporate user-generated content and reviews to enhance engagement.
Assumption to check: Limited user engagement due to static content.
Validate with people who use this workflow before building.
Hypothesis 2
Implement location-based search and filtering.
Assumption to check: Difficulty in finding spots based on current location.
Validate with people who use this workflow before building.
Hypothesis 3
Add functionality for users to share favorite spots on social media.
Assumption to check: Lack of social sharing features.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce clear subscription benefits and features to enhance purchases.
Assumption to check: Monetization strategy not clear.
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
Discover Japan’s Best Cherry Blossom Viewing Spots Plan your perfect hanami experience with SakuraSpot. Find beautiful cherry blossom locations across Japan with detailed information, photos, and the best times to visit. Curated Viewing Locations Explore handpicked sakura spots from Tokyo to Kyoto. Each location includes descriptions, photos, and seasonal bloom guidance to help you plan your visit. Interactive Map Browse cherry blossom locations on an easy-to-use map. See photos, read about each spot’s unique features, and get directions to your chosen destination. Bloom Season Guide Learn when cherry blossoms typically bloom in different regions. Understand the sakura calendar so you can plan your trip for the best viewing window. Save Your Favorites Bookmark locations you want to visit and create your own hanami itinerary. Perfect for planning a cherry blossom tour across Japan. Features: • Curated selection of top cherry blossom spots • High-quality location photos • Seasonal bloom timing information • Easy-to-navigate map interface • Offline location access • Available in English Whether you’re visiting Japan for the first time or returning for sakura season, SakuraSpot helps you find the most beautiful cherry blossom viewing locations.
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
TypeScript
Supabase
react-navigation
react-native-maps
BUILD KIT DIFFICULTY
Intermediate
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.
