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
9/11 Memorial Audio Guide
The National September 11 Memorial & Museum is a place to remember and honor the people killed as a result of the four coordinated terrorist attacks on September 11, 2001, and the World Trade Center bombing on Februar...
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
13 ratings · Top 50%
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 included16 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 9/11 Memorial Audio Guide: map the core Education 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 more free trials or sample segments to entice users.
Assumption to check: Limited free content can deter users from trying the app
Validate with people who use this workflow before building.
Hypothesis 2
Ensure compatibility and performance optimization for older hardware.
Assumption to check: Audio playback can be buggy on older devices
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate gamification elements to enhance user engagement.
Assumption to check: Lack of user engagement features like quizzes or discussions
Validate with people who use this workflow before building.
Hypothesis 4
Implement a guided onboarding process to improve navigation.
Assumption to check: Navigation can be confusing for new users
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 National September 11 Memorial & Museum is a place to remember and honor the people killed as a result of the four coordinated terrorist attacks on September 11, 2001, and the World Trade Center bombing on February 26, 1993. The 9/11 Memorial is located at the site of the former World Trade Center complex and occupies approximately half of the 16-acre site. The 9/11 Memorial audio tour, narrated by Anthoula Katsimatides, a New Yorker whose brother, John, was killed on 9/11, highlights several victims honored at the Memorial and their lives before 9/11. The tour leads listeners around the North Pool, down to the South Pool and back up to the entrance of the 9/11 Memorial Museum. The tour also stops at the Survivor Tree and the 9/11 Memorial Glade. Features of the 9/11 Memorial App: • Map-based tours for easy navigation • Universally-designed • Transcripts available on every stop • Images with audio descriptions • Customizable font sizes and color modes • VoiceOver compatible on all iOS devices
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 Navigation
Expo-AV
Supabase
Axios
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.
