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
Louvre HD
“It is a beautifully done app that takes you on a virtual tour of one of the greatest collections of paintings in the world.” - The Unofficial Apple Weblog
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
394 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 included17 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 Louvre HD: map the core Lifestyle 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
Add augmented reality features or virtual tours.
Assumption to check: Limited interactive features for exploring art
Validate with people who use this workflow before building.
Hypothesis 2
Implement social features for users to share favorites.
Assumption to check: No community features for sharing experiences
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate a news section for upcoming exhibitions.
Assumption to check: Static content without updates
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their homepage based on interests.
Assumption to check: Lack of personalization options
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
“It is a beautifully done app that takes you on a virtual tour of one of the greatest collections of paintings in the world.” - The Unofficial Apple Weblog Virtual tour of the art galleries of the Louvre - you will find here the most famous paintings of the museum: - "Mona Lisa" by Leonardo da Vinci - “The Coronation of Napoleon I” by Jacques-Louis David - "Marriage in Cana" by Veronese - "The Lacemaker" by Vermeer Our app guides you through the treasures of the museum, where you can enjoy the masterpieces of world art and become more erudite. CUSTOMERS REVIEWS “It's the best. I would recommend it to anyone. Great way to enjoy great art collections. I absolutely love it!” – andrerem “It's a wonderful treasury for the all ages people.” - El Diamante “A very nice introduction to the paintings of the Louvre. A valuable resource to art education.” - AzinFrance KEY FEATURES - 2300 paintings of more than 800 masters of painting - Separation of paintings by genres and authors - Download of paintings in high resolution - Access to HD versions of paintings - Convenient search for paintings - Adding paintings to My favorites - Custom works filter - Slideshow Mode - Download paintings for the offline viewing - Zoom of Paintings
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
Zustand
Axios
react-navigation
expo-image-picker
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.
