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.
One-time purchase
$7.99 · 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 Merchant of the Skies: map the core Games 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 gameplay depth and variety in missions
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High cost for the app with no free trial
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of multiplayer features
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.
One-time purchase. No ads, no in-app purchases. 87% Very Positive on Steam: 1,426 reviews. A world of floating islands drifts above the clouds. You are its merchant. Chart your own course through a living sky, discover trade routes between island settlements, and build a trading empire at your own pace. No missions pushing you forward. No timers ticking down. Just the open sky, your airship, and endless possibility. This is a cozy trading simulation where you set the rules. What you will do: - Master trading routes: find the most profitable paths, exploit dynamic markets, and compound your wealth across the islands - Explore a procedural world: every playthrough reveals new secrets, quirky characters, and unique encounters at every island - Build and automate: buy islands, set up production chains, deploy caravans for passive income while you explore - Design your sky mansion: 200+ customizable blocks to build and showcase your skyborne headquarters - Play fully offline: no internet required, no session limits, play anywhere at any time - Enjoy a complete story: a rich campaign to restore the world, followed by unlimited sandbox mode with no endpoint - Trade strategically: prices shift with supply and demand across a living market system - Discover island stories: meet traders, outcasts, and wanderers scattered across the sky - Build your legacy: grow from a single ship to a full merchant empire spanning the islands - No interruptions: one-time purchase, yours forever, no pay-to-win mechanics For fans of cozy trading simulations, tycoon builders, and sandbox strategy games.
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.