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 Finder: parking navigator
If you have a car, then download this application – sooner or later, but it is highly useful to you!
$0.99 · In-app purchases
PRICE
$0.99
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.
Build your own version
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 included15 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 Finder: parking navigator: map the core Navigation 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 visual reminders or augmented reality features to easily locate parked cars.
Assumption to check: Users often struggle to remember where they parked their cars.
Validate with people who use this workflow before building.
Hypothesis 2
Implement more robust location tracking and user feedback mechanisms.
Assumption to check: Inaccurate location tracking can lead to frustration.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to add notes and photos to saved locations for better context.
Assumption to check: Limited customization for saved locations.
Validate with people who use this workflow before building.
Hypothesis 4
Offer one-click navigation to parked cars using popular mapping services.
Assumption to check: Lack of integration with navigation apps.
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
If you have a car, then download this application – sooner or later, but it is highly useful to you! Simple and user-friendly application "Car Finder," will help you find your car in the parking lot of a large hypermarket, in an unfamiliar city or area, and even help to get out of the forest and not get lost. The concept is simple. One button "Save this place" - click it when you leave the car, and the application will remember this place. When you need help finding a car - just open the "Car Finder" and the app will show you where to go. Here are examples of situations that will help to solve "Car Finder": 1. Parking hypermarket. You have arrived and parked on a huge parking lot, where thousands of other machines. When the purchase is completed, "Car Finder" save you time finding the location of parking. It just shows where to go. 2. You have come to a new city. You parked the car and went to see the sights. How to find your way back? "Car Finder” remember the address of the parking and show it to you. In addition, you will see the distance to the car to get to solve it on foot or use public transport. 3. You go looking for mushrooms. We left the car and went into the woods. So If it gets dark before you are out of the forest? "Car Finder" do not need an Internet connection, and it will show you the right direction out of the forest. 4. We believe that such situations can be much more :)
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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
React Native
Expo
react-navigation
axios
@react-native-community/geolocation
expo-permissions
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.
