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
Lights Out: Formula Stats
Lights Out is a beautiful and comprehensive real-time race statistics app built for Liquid Glass
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
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Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Lights Out: Formula Stats: map the core Sports workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
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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 intuitive tab navigation.
Assumption to check: Users find it hard to navigate between different stats.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize data handling and loading states.
Assumption to check: App crashes during heavy data loads.
Validate with people who use this workflow before building.
Hypothesis 3
Add more user customization features.
Assumption to check: Limited customization options for profiles.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social media sharing for achievements and stats.
Assumption to check: No social sharing options.
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
Lights Out is a beautiful and comprehensive real-time race statistics app built for Liquid Glass. It’s simple enough for those getting into the sport, and powerful enough for seasoned pros. WHY YOU’LL LOVE LIGHTS OUT: Get all the latest stats and info from races, qualifying sessions, sprints, and practice sessions. Stay up to date with Widgets on your Home Screen and Lock Screen, get race updates when they happen, and catch up on what you missed on your Watch. View pit stop data, listen in to driver radios, read race control messages, and more. NOTABLE FEATURES: - Beautiful Liquid Glass UI - Apple Intelligence to give concise Commentary Summaries - Widgets to display race countdowns, upcoming Grand Prix, driver and team standings, and more (on your Home Screen and Lock Screen) - View the season’s races on a globe - Comprehensive race results - Set alarms and push notifications for upcoming events - Watch app to browse the current season’s races, weekend structure, track information, and standings OTHER EXCITING FEATURES: - Fastest laps - Race breakdowns for, pit stops, overtakes, and more - Race control messages and flags - Listen in to driver radio messages - Driver and team standings - Extensive track details - Weather forecasts - Entire weekend structure - Driver and team history and stats - Accessibility, dynamic font sizing, and VoiceOver support
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
Zustand
react-native-reanimated
react-native-svg
expo-router
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.
