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
London Tour Map of Banksy
British graffiti artist Banksy has achieved worldwide fame for his thought-provoking and satirical street art, with some of his most iconic and recognisable works still remaining across London.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
4 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 London Tour Map of Banksy: 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
Implement offline caching for map data and artwork details
Assumption to check: Limited offline functionality for browsing locations
Validate with people who use this workflow before building.
Hypothesis 2
Add a feature for users to submit their own Banksy artwork photos and reviews
Assumption to check: No user-generated content or reviews
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate user preferences for saved artworks and recommended locations
Assumption to check: Lack of personalization features
Validate with people who use this workflow before building.
Hypothesis 4
Enhance premium offerings with exclusive content or early access to new artworks
Assumption to check: Premium features may lack value
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
British graffiti artist Banksy has achieved worldwide fame for his thought-provoking and satirical street art, with some of his most iconic and recognisable works still remaining across London. The London Tour Map of Banksy is an interactive guide to the remaining Banksy artwork in London; pinpointing your location and providing directions to every artwork site. With background information, photos, location markers, and Google Maps navigation built in, this is the essential guide for discovering Banksy artwork across London. Featuring many of the most well-known and central artwork pieces, spanning Shoreditch, Camden, Mayfair, Waterloo and beyond, this app is the perfect companion for an immersive walk around London. Designed specifically for use on the move, the app makes it easy to see your location in relation to nearby artwork sites, and even launch navigation directions directly from within the app. Key app features include: ALL BANKSY’S IN LONDON 2026 • All locations fully checked and updated for 2026 • Newly reviewed artwork information and updated site details across the app MULTILINGUAL SUPPORT • English • Spanish • French • Polish • Chinese • German • Dutch INTERACTIVE MAP • Interactive geolocation map pinpointing all Banksy artwork and distance from your location • View the next nearest artwork location in real time as you move • Navigate by the nearest artwork to you with live distance updates • Complete navigation directions (walking, public transport, and driving) to all locations • Easily explore and discover artwork while on the move ARTWORK HISTORY • Background history and photos for all London artworks • Further reading links to related articles and points of interest • Sight-spotting tips to help you locate artwork when visiting sites OFFLINE APP • No internet connection required to view saved location information and photos FAVOURITES • Save your favourite artwork locations for quick future access
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
react-navigation
axios
react-native-maps
react-native-image-gallery
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.
