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
Autotrader - Shop & Buy Cars
Welcome to Autotrader – your ultimate car buying solution
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
344,851 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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Combine features and design from your favorite apps.
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What's included19 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Autotrader - Shop & Buy Cars: map the core Shopping 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
Implement persistent filters on the search page.
Assumption to check: Difficult navigation between search filters and results
Validate with people who use this workflow before building.
Hypothesis 2
Include more details and user reviews on car cards.
Assumption to check: Limited details on car listings
Validate with people who use this workflow before building.
Hypothesis 3
Streamline adding/removing favorites with better UI feedback.
Assumption to check: Inconsistent favorite management
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image loading and caching for better performance.
Assumption to check: Slow loading times for images
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
Welcome to Autotrader – your ultimate car buying solution. With thousands of dealers and private sellers in our network and millions of cars to choose from, you can seamlessly find cars in your price range in just a few clicks. FIND THE RIGHT CAR FOR YOU - Guarantee that the car price is fair with Kelley Blue Book® Price Advisor on every Autotrader Dealer listing. - Estimate your future car payment. - Access comprehensive car buying and selling tips. - Get vehicle pricing and discover seller discounts. - See car safety information and vehicle reports. - View our competitive financing options. - Explore the best deals on new and used cars or trucks near you. - Browse detailed listings and comprehensive vehicle history reports so that you can purchase vehicles with confidence. With millions of cars to choose from you are sure to find your perfect ride. Download today to buy your next car! AUTOTRADER APP FEATURES: BUY NEW AND USED CARS - Be as specific as you need and let our AI powered search filters do the work for a seamless car shopping experience. - Create a free "My Autotrader" account to add your favorite cars and searches to your watchlist. - Pick up where you left off while car shopping in-app or online. - Get recommendations based on features you care about. - Search by keyword to find specific cars near you that meet your needs. - Sign up for alerts on price drops and get notified when new listings that match your search criteria are added. - Find the best deal as you buy cars: Look for the Good Price or Great Price green badge in the top right corner of the listing. - Can't find it today? Add a search criteria and we will let you know when vehicles that meet your criteria are added to our list of vehicles. - Get Vehicle History Reports (when available) along your search. - Delivery door feature: Vehicles can be shipped to your front door. CAR SHOPPING EXPERIENCE - Share cars with friends and family via email or text. - Contact a seller by phone, text, or email directly from a vehicle listing. - Schedule test drives right from the app. - Find vehicles in your budget and know what you’ll pay before you buy. - Receive personalized recommendations. Our mission at Autotrader is to be your ultimate online solution for buying and selling new, certified and used cars. For classic cars (1990 and older), please visit Autotrader Classics at https://classics.autotrader.com/
Written user reviews are not shown here. Check current App Store reviews >
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
React Native
Expo
Supabase
Zustand
React Navigation
React Native Reanimated
BUILD KIT DIFFICULTY
Expert
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.
