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
Cruisers of the US Navy
CRUISERS of the US NAVY has been completely rewritten with a modern design and codebase, optimized for the latest iPhones and iPads
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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/
Preview a sample Build Kit No email needed
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 Cruisers of the US Navy: 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
Incorporate user-generated content and frequent updates.
Assumption to check: Limited content updates and information accuracy
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced search and filtering options.
Assumption to check: Navigational difficulties in finding specific cruisers
Validate with people who use this workflow before building.
Hypothesis 3
Add quizzes, trivia, or interactive maps related to cruisers.
Assumption to check: Lack of engaging features or interactivity
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their profiles and follow favorite cruisers.
Assumption to check: Insufficient personalization options
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
CRUISERS of the US NAVY has been completely rewritten with a modern design and codebase, optimized for the latest iPhones and iPads. This app is the ultimate way to explore the history and view stunning photos of every US Navy Cruiser. With over 800 high-quality photos, this app vividly brings to life the fascinating stories of these legendary ships. You can search the full history of the cruiser. You can view the cruisers by class, chronologically, or alphabetically. Each cruiser features a complete history, from its commissioning to its decommissioning or scrapping. The app also includes detailed specifications for each ship. Users can save their favorite ships and even share photos with friends via email. From the USS Albany to the latest Ticonderoga-Class Cruiser, the USS Port Royal, this app covers the full legacy of US Navy Cruisers. While the app offers an enhanced experience for iPad users, including the ability to zoom in and explore intricate details of the high-resolution photos, it is fully optimized for iPhones as well. The redesigned interface ensures a seamless and modern experience across all devices, making it easier than ever to uncover the hidden details and rich history of these ships. CRUISERS of the US NAVY is part of a series of apps by Historycentral celebrating the US Navy. Over time, free updates will add even more photos and information, making this app an essential resource for anyone interested in naval history.
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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.
SUGGESTED BUILD STACK
React Native
Expo
FastAPI
Axios
React Query
Shadcn/UI
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.
