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
Vatican Museums guide
The Unofficial Guide to the Vatican Museums
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.4
8 ratings · Below Average
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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What's included18 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 Vatican Museums guide: 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
Offer a wider range of audio tracks and exclusive content.
Assumption to check: Limited audio guide content compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a guided onboarding tutorial.
Assumption to check: Navigation can be confusing for first-time users
Validate with people who use this workflow before building.
Hypothesis 3
Integrate push notifications for event reminders and updates.
Assumption to check: Lack of real-time updates on events
Validate with people who use this workflow before building.
Hypothesis 4
Make premium features more prominent and clearly communicate benefits.
Assumption to check: In-app purchases feel hidden
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 Unofficial Guide to the Vatican Museums Customer reviews: “Do not go to the Vatican's museums without seeing this app before.” – Manuel Seda “We used this app for the Sistine chapel. With the dramatic music and close up pics to enhance the narrative, I was moved to tears hearing about the history and meaning of each art piece” – Dghbxruojj “Simply the best app for the Vatican Museums. There might even be another app more complete, but not as good as this one. Its breathtaking!!!“ – V.M.N.A “It is absolutely worth paying for. Better than an audio guide, because you have text and pictures as well! I loved it! One of the best apps I have ever had.” – Jeroandris --------------------------------------------- Features: • Image Recognition for artworks (like Shazam!) • Points of Interest with GPS coordinates for Apple Maps • 120 minutes of storytelling in high quality audio • Earphones functions: Play/Pause, Rew, FF, Tap for texts • Background audio playback • No internet required for audio playback and image recognition • Search engine for artwork or artists. • Suggested route video • Keep track: save your favorites artworks Image recognition for museums Download the Unofficial guide to the Vatican Museums App, launch it by tapping on "Scan" and frame the artwork as if you wanted to take a photo. The artwork is immediately recognized, just like magic, without the need for an internet connection. Photos, audios and videos ItalyGuides.it reinvented audio-guides, giving them the feel of “Cinema” with movie-style music and narration by American voice actors dramatically enhancing the storytelling process. The most important artworks allows visitors to be involved by listening to audio guides and a photo gallery to comment on the artwork. INTERNATIONALLY RECOGNIZED ItalyGuides.it website has received considerable recognition and international awards during recent years and has been featured in several magazines and TV shows such as: - The Oprah Winfrey Show - BBC (British Broadcasting Corporation) - UNESCO (United Nations Educational, Scientific and Cultural Organization) - Venice department of the Italian Ministry for Cultural Heritage - RAI (Italian public Television) - RSI (Swiss public Television) - Winner of SMAU Mob App Award 2012 - Yahoo! - El Pais - El Mundo For more information: www.ItalyGuides.it
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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
Advanced
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.
