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.
App Overview
Car Match - Traffic Puzzle
Discover Car Match!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
104,732 ratings · Top 15%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Car Match - Traffic Puzzle: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Introduce new levels and themes regularly to retain users.
Assumption to check: Limited variety of puzzles over time
Validate with people who use this workflow before building.
Hypothesis 2
Add seasonal challenges or events to keep gameplay fresh.
Assumption to check: Repetitive gameplay can lead to boredom
Validate with people who use this workflow before building.
Hypothesis 3
Improve clarity of what each purchase offers and streamline the buying process.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Implement ad-free subscription options and reward users for watching ads.
Assumption to check: Ads can disrupt user experience
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Discover Car Match! Embark on a thrilling journey where every move brings excitement. This engaging game combines traffic management and matching mechanics to provide the perfect stress relief. Strategically order cars to clear traffic jams and solve intricate puzzles. Dive into a world where every level a satisfying experience! Quick Play Guide - Start Simple: Tap a car to collect it, and match three cars of the same color in your holder to clear them from the board. - Think Ahead: Collect cars only if they have at least one open side. Plan to avoid filling your holder and strategically match the cars. - Embrace Complexity: With each level, matching and collecting cars require more thought. Every move is crucial. - Utilize Boosters: Stuck? Use 'Undo' to reverse moves, 'Shuffle' to rearrange the cars, 'Super Undo' to save cars for later, or 'Magnet' to make matching easier. Cool Features - Exciting Levels: Each stage brings a fresh challenge of car matching and fun. - Powerful Boosters: Boosters make your car-matching quest smoother and more enjoyable. - Vivid Graphics: Bright and colorful cars make every move a delight, turning matching into a visual treat. - Rewards & Surprises: Earn rewards and discover surprises to power through puzzles, adding a layer of strategy to your matching. - Challenging Obstacles: Overcome tunnels, boxes, walls, and elevators for an extra thrill. Why Play Car Match? - Sharpen Your Mind: Each puzzle is a fun test of strategy and wit, blending elements of car matching into each challenge. - Relaxing Fun: Dive into a soothing, colorful escape, where matching cars provides a relaxing experience. - Adventure at Every Turn: New challenges and surprises make every level an exciting adventure in car matching and puzzle-solving. Get Ready to Match and Play! Download Car Match now and start your thrilling, colorful journey. The world of fun puzzles and car matching awaits!
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
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BUILD KIT DIFFICULTY
Intermediate
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.
