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
National Gallery, London HD
“the interface is simple and clean
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
98 ratings · Top 15%
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for National Gallery, London 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
Include interactive elements like quizzes or virtual tours.
Assumption to check: Limited interaction with artworks, mostly static content
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline caching for audio and images.
Assumption to check: No offline access to audio guides or artworks
Validate with people who use this workflow before building.
Hypothesis 3
Add advanced filtering and sorting features.
Assumption to check: Limited filtering options for artworks
Validate with people who use this workflow before building.
Hypothesis 4
Ensure responsive design and testing on multiple device sizes.
Assumption to check: Inconsistent experience across different devices
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
“the interface is simple and clean. the art speaks for itself.” – sharechair “the app is a solid value for the number of paintings it delivers, without bells and whistles.” – padgadget art gallery in your pocket. app presents a unique opportunity to enjoy the masterpieces of world art at any time. maybe, you are going the subway, or standing in a traffic jam with our app you can use this time to visit the world of rubens, titian and rembrandt. you can easily save the masterpieces you like to your iphone or ipad as well as send hd picture to your e-mail. also you can share pictures with your. if you are tired after a hard day, just put the app in slide-show mode, turn on the classical music and enjoy the best pictures of the world art! extra feature you can download any work in hd quality from our server absolutely free! reviews "the images are inspirational, educational and simply stunning! all images can be downloaded and users can also receive high-resolution files of any works of art." - yiota orphanides, iphoneappcafe.com "all in all though, this is an app that is a soothing mental break, especially during a long day. if you enjoy art, national gallery, london is a great download for your collection." - lisa caplan, appadvice & sahgeekmom.com "the national gallery, london app is an amazing chance to view the wonderful work stored at the most famous gallery in england." - marlon votta, product reviews. feature highlights - universal app for iphone/ipod/ipad - 1635 best paintings by over 500 painters - download hd pictures from server into photoalbum - getting the hd version of each picture (from 1548*4226 to 7689*4215 pixels) via email - separation of paintings by authors, genres - easily search for paintings - custom filter results - slideshow, favorites - send pictures via email - support for hd graphics on ipad enjoy your viewing!
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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.
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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.
