App Overview

CARFAX - New & Used Cars icon

CARFAX - New & Used Cars

CARFAX, Inc. · Shopping

Shop for new, used and certified pre-owned cars near you with the convenience of an app and the confidence of CARFAX! 

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.9
368,002 ratings · Top 5%

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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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.

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.

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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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for CARFAX - New & Used 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 a more robust filtering and sorting mechanism to streamline the search process.

Assumption to check: Users often find it difficult to navigate through numerous listings.

Validate with people who use this workflow before building.

Hypothesis 2

Provide comprehensive vehicle reports and history for each listing.

Assumption to check: Limited vehicle history details available compared to competitors.

Validate with people who use this workflow before building.

Hypothesis 3

Simplify the subscription model and clearly highlight benefits to users.

Assumption to check: In-app purchase process can be confusing.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to customize notification preferences to enhance user experience.

Assumption to check: Push notifications can be overwhelming.

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

Shop for new, used and certified pre-owned cars near you with the convenience of an app and the confidence of CARFAX!  App Features • All used car listings include a free CARFAX Vehicle History Report. • Save your favorites — get alerts when the price drops! • See how CARFAX calculates the value of a car based on its history.  • Listings include photos, top features, mileage, and more! • Find exactly what you want with filtered searches and sorting. • Easily compare listings. • See the price history of the cars you’re interested in. • Read dealership reviews from actual customers.  • See if the car you want is still available, directly in the app!  Download the CARFAX app for these great features — and more! CARFAX Confidence Millions of people trust CARFAX each year because we have the most comprehensive database of vehicle history information in North America. With more than 151,000 data sources and over 35 billion records, you can trust a CARFAX Vehicle History Report to tell you key details you’ll want to know about a used car before you buy it.  CARFAX Reports include information such as: • Reported accidents and damage, including severity and the point of impact. • If the car’s airbags have ever been deployed, if there’s been flood damage or other potential issues. • How many owners the car has had in its lifetime and what it was used for. • A history of odometer readings.  • Title information, including if it’s been salvaged, junked, or declared a lemon. • A vehicle’s service history.  • State emissions and inspection results.

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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.

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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.