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
U.S Navy Ships: A History
The compete history of all US Naval Ships is included in this comprehensive program
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
6 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 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 U.S Navy Ships: A History: map the core Reference 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 a user-generated content feature allowing users to submit new information.
Assumption to check: Limited content updates leading to stale information.
Validate with people who use this workflow before building.
Hypothesis 2
Utilize better spacing and grouping for UI elements to enhance readability.
Assumption to check: User interface may feel cluttered.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate a caching mechanism to allow users to access content offline.
Assumption to check: No offline access to content.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the in-app purchase flow and provide clear explanations of benefits.
Assumption to check: In-app purchase process can be confusing.
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 compete history of all US Naval Ships is included in this comprehensive program. This app contains photographs of every United States Naval Aircraft Carrier, Battleship, Cruiser, Destroyer and Submarine. Nearly 10,000 ship histories are included in this massive project. A detailed history of every ship is also included– (mostly from the official US Naval history, with supplementary sources to incorporate entries on each of the modern ships). All of the photographs in our app are high quality. Using the iOS function each photo can be zoomed in to view exquisite detail. They look absolutely gorgeous on the retina displays. We will update this app once a quarter with additional photos. Each quarter the app will contain a "new photos of the quarter section." All of the photographs and history entries in our US NAVY SHIPS can be e-mailed, added to your photo library and/or printed.
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
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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.
