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.
We've compressed and optimized the complete US Coast Guard's boat manufacturer database of over 16,000 boat builders, and over 30,000 brands to fit on your iOS device, so you can have lightning fast results wherever y...
$9.99 · 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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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 HIN Search - Boat HIN Decoder: 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 information on some HINs
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Slow loading times for search results
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of user customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited onboarding for new users
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.
We've compressed and optimized the complete US Coast Guard's boat manufacturer database of over 16,000 boat builders, and over 30,000 brands to fit on your iOS device, so you can have lightning fast results wherever you are, with NO Internet access needed! No more wondering "Who made that boat?" Important HIN Search features include: • Decoding of US 12 digit and 14/15 digit HINs • Detection of suspicious or possibly altered HINs - an important first step to make sure a boat is not stolen! • Boat manufacturer and build date information. • Print, copy or share your results. • Searching for manufacturers by their company or brand names • No Internet access needed, so you can use this app no matter where you are. • Favorites List, including your own personal notes. • Share/Print/Save results as an Image. • Developed by someone who knows and understands boats. Nearly all boats (including fishing boats, power boats, sail boats, jet skis, kayaks, and canoes) imported or built in the US since 1972 are required to have a HIN by the federal government. The HIN will include when the boat was built, and by who. With the included Manufacturer database, HIN Search can also tell you a little bit about the builder, such as if they are still in business, their address, and sometimes even a website. What this app DOES NOT do: • Retrieve boat model information other than year. This information is NOT encoded universally in the HIN. If the boat manufacturer is still in business, please contact them directly with your HIN. • Tell you if the boat is stolen. We can tell you if the boat HIN looks suspicious and warrants a closer look, but that's it. • Decode boat identification numbers for boat built before 1972. • Retrieve boat's past or current owners or sale information. Please contact your local vehicle registration authority. Please don't leave a negative review with regards to what is clearly stated above! This app only decodes HINs for boats which were built or imported legally in the USA since 1972. Some older (1970s) boat manufacturers "in business" dates may be incorrect. The USCG records are sometimes inaccurate. This is a great tool for both marine professionals and boat shoppers! No limits on number of HINs you can decode, or manufacturers you can look up. No hidden or extra fees. Buy once, use forever. Ad free, and will relieve you of scratching your head wondering, "Who made that boat?"
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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.