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 parts for Lexus (EPC)
A simple and fast solution for finding original auto parts by VIN number or car model for Lexus.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Car parts for Lexus (EPC): map the core Reference 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
Provide comprehensive details and images for each part.
Assumption to check: Limited part information and specifications
Validate with people who use this workflow before building.
Hypothesis 2
Implement enhanced search and filtering options.
Assumption to check: Difficult navigation between parts
Validate with people who use this workflow before building.
Hypothesis 3
Integrate real-time inventory updates.
Assumption to check: Infrequent updates on part availability
Validate with people who use this workflow before building.
Hypothesis 4
Offer better customer support and feedback mechanisms.
Assumption to check: Poor user reviews indicating lack of support
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
A simple and fast solution for finding original auto parts by VIN number or car model for Lexus. Get detailed technical diagrams, up-to-date information, and save cars in your personal “Garage” — all in one app. Accurate data and reliable diagrams — database updated monthly. Features: Search by VIN and car model — Instantly find the exact configuration and all available spare parts for your vehicle. Save cars to Garage — Quickly switch between favorite vehicles — convenient for both private users and auto services. Detailed parts diagrams — High-quality assembly drawings with part numbers and zoom option for better detail view. Comprehensive part information — Weight, analogs, quantity, compatible and replaceable parts — everything you need for accurate selection and ordering. Multilingual support — Available in 10 languages: English, German, Russian, Spanish, French, Italian, Ukrainian, Czech, Slovak, Romanian, Turkish, Lithuanian, Estonian. Share information — Share part details with one tap: easily send data via messenger or email. Dark mode supported.
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
react-navigation
Zustand
@supabase/supabase-js
BUILD KIT DIFFICULTY
Advanced
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.
