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
KeepAuto: Car Maintenance
KeepAuto: Your Personal Car Maintenance Assistant
$1.99 · In-app purchases
PRICE
$1.99
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's included18 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 KeepAuto: Car Maintenance: map the core Utilities 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 push notifications for service reminders.
Assumption to check: Users often find it hard to remember when to service their cars.
Validate with people who use this workflow before building.
Hypothesis 2
Add multi-car support with an easy switcher.
Assumption to check: Tracking multiple cars can be cumbersome.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate with calendars to auto-log services.
Assumption to check: Users may forget to log maintenance entries.
Validate with people who use this workflow before building.
Hypothesis 4
Include visual reports for maintenance history.
Assumption to check: Lack of visual data representation (charts/graphs).
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
KeepAuto: Your Personal Car Maintenance Assistant Track maintenance, fuel, and expenses — all in one beautiful, private app. Never miss an oil change or service appointment again. Now available in 10 languages: English, Chinese, Japanese, Korean, Spanish, French, German, Portuguese, Hindi, and Arabic. ▶ YOUR GARAGE - Add and manage all your vehicles in one place - Upload a custom photo for each car - View each vehicle's complete maintenance timeline at a glance ▶ LOG SERVICES - Record oil changes, tire rotations, brake jobs, and any repair - Track costs, shops, mileage, and notes for every entry - Build a complete, searchable service history over time ▶ LOG FUEL - Log fill-ups with cost, liters, and odometer reading - Scan fuel receipts with your camera — on-device ML reads the details instantly - Track fuel efficiency trends with beautiful charts - See breakdowns by station, fuel type, and month ▶ CHAT - Add entries using natural conversation — just describe what happened - KeepAuto understands casual language and logs it for you - The fastest way to keep your records up to date ▶ INSIGHTS - Get smart maintenance reminders based on your driving patterns - See upcoming services before they're overdue - AI-powered suggestions to help you stay ahead of wear and tear ▶ PRIVACY-FIRST DESIGN - All data stays on your device — receipt scanning and AI run entirely on-device - No account required — start tracking in seconds - No ads, ever - iCloud sync keeps your vehicles backed up across devices ▶ FULL APP — ONE-TIME PURCHASE Pay once, use forever. No ads, no subscriptions, no hidden fees. Track services. Log fuel. Keep your car healthy. ~~~ Terms: https://keepauto.app/terms Privacy: https://keepauto.app/privacy
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.
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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.
