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.
DESTROYERS of the U.S
$1.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Destroyers 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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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
Assumption to check: Limited content depth and engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of offline access to content
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High reliance on in-app purchases without free value
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
DESTROYERS of the U.S. NAVY is a comprehensive digital history of America’s destroyer force, combining authoritative narratives with an unparalleled photographic archive. The app presents the service histories and imagery of every U.S. Navy destroyer, bringing more than a century of naval history vividly to life. Featuring over 1,100 high-quality photographs of more than 1,000 ships, the app is optimized for the iPad and the latest iPhones. Advanced zoom capabilities allow users to examine photographs in exceptional detail, revealing features and moments that are often lost in print or standard displays. The app includes full-text search, enabling users to explore ship histories in depth—for example, instantly identifying all destroyers that participated in the Battle of Midway. Ships can also be browsed alphabetically, chronologically, or by class, offering multiple, intuitive paths through the material. DESTROYERS of the U.S. NAVY provides complete service histories for every destroyer, from commissioning through deactivation, reserve status, or scrapping. Active ships have been updated through 2025, and each entry includes key technical specifications. Users can mark favorites and share photographs by email. Covering every destroyer from USS Bainbridge to the latest Zumwalt-class ships, the app is designed for both iPhone and iPad and serves as an essential reference for historians, naval enthusiasts, and students alike. Ongoing free updates will continue to add new photographs and historical material for current users.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.