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.
Island Designer is a powerful and intuitive island map editor that helps you plan every detail of your dream Animal Crossing island
$5.99 · 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 Island Designer: map the core Entertainment 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: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor performance
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.
Island Designer is a powerful and intuitive island map editor that helps you plan every detail of your dream Animal Crossing island. Choose from 76 pre-built island templates or start from a blank canvas — the possibilities are endless. TERRAIN & PATHS Sculpt your island with 3 levels of grassland, water, rocks, and sand using adjustable brush sizes. Lay down 9 types of paths — dirt, sand, stone, brick, dark dirt, arcane, wood, and 2 custom styles — to build your ideal road network. BUILDINGS & STRUCTURES Place 50+ buildings and structures including houses, shops, museums, town halls, airports, bridges, and stairs. Every building shows its precise grid footprint for accurate placement. TREES & FLOWERS Bring your island to life with 14 tree types (broadleaf, pine, fruit, bamboo, and more) and 50+ flower varieties including bushes, shrubs, and reeds. Drag to batch-plant for quick landscaping. PRECISION GRID Work on a detailed 112×96 grid with labeled blocks (1–7 columns, A–F rows). Zoom in to reveal fine cell-level gridlines for pixel-perfect placement. FULL EDIT CONTROL Select, move, and delete any placed object with a single tap. Undo and redo up to 50 steps. Each category has its own dedicated eraser, plus a global terrain eraser to restore original land. SAVE & HISTORY Auto-saves every 60 seconds so you never lose progress. Name and manage multiple map designs. Duplicate, rename, or delete saved maps anytime. HD EXPORT Export your finished map as a high-resolution image with gridlines directly to your photo library — perfect for sharing your plans with friends. BILINGUAL SUPPORT Full Chinese and English interface. Switch languages anytime in Settings. Whether you're a seasoned island architect or just getting started, Island Designer gives you everything you need to visualize and create the perfect island layout.
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.