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.
Many sailors are attracted to catamarans because they offer exhilarating sailing speeds, spacious decks and living quarters, and a stable ride
$3.99 · 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 ASA's Catamaran Challenge: 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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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 variety which can lead to user disengagement.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchase confusion regarding unlockable content.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited progress tracking features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social features for community engagement.
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.
Many sailors are attracted to catamarans because they offer exhilarating sailing speeds, spacious decks and living quarters, and a stable ride. A feature that’s not so apparent until you’re actually on board and operating a catamaran is its phenomenal maneuverability under power at low speeds. Two engines and two propellers spaced widely apart enable you to pivot a catamaran 360 degrees within its own length — in either direction — without touching the steering wheel. Operating a twin-engine catamaran under power is very different from operating a single-engine monohull, this app is designed to teach you the nuances and allow you to practice these new skills. The app includes five learning modules that will teach you the basics of operating a twin-engine catamaran, how to perform a standing turn, how to perform a looping turn, and how to maneuver the boat at slow speeds using just the throttles. The app also includes a number of challenge modules that put your new skills to the test - practice picking up a mooring buoy, or docking the catamaran in a marina.
Written user reviews are not shown here. Check current App Store reviews >
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.