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
NASCAR MOBILE
NASCAR MOBILE: The Official App of NASCAR
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
196,056 ratings · Top 15%
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.
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Combine features and design from your favorite apps.
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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 NASCAR MOBILE: map the core Sports workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
NASCAR MOBILE: The Official App of NASCAR Experience NASCAR like never before with the official app built for race-day intensity, deeper insights, and nonstop fan engagement. Follow every lap across the NASCAR Cup Series, NASCAR O’Reilly Auto Parts Series, and NASCAR Craftsman Truck Series with real-time data, live audio, exclusive video, fantasy tools, and interactive features designed for every level of NASCAR fan. Live Race Experience - Race Tracker & Enhanced Leaderboard (All Series Races) - Real-time race tracking with enhanced visuals and insights. - Customize your view with filters for such as Top 10, Favorites and Full Field - Landscape View - Free access for NASCAR Fan Rewards members. Alternate Leaderboards (All Series Races) - Free stats: Stage Points, Lap Leaders, Fastest Laps, and more. - Premium stats: Win Probability, Movers & Fallers, Fastest Laps Run, 10-Lap & 20-Lap Averages, Laps in Top 10. Live Race Driver Stories (Cup Series Races) - Follow individual drivers during the race with enhanced storytelling. - Watch a mix of in-car clips and broadcast highlights tied to live race moments. Timeline (All Series Races) - Lap-by-lap race updates with fun facts, milestones, and key insights in real time. Pit Crew Rosters (Cup Series Races) - View full pit crew lineups, including crew chief, spotters, tire changers, jackman, and gasman. NASCAR Fantasy Live - Play season-long fantasy games and compete against friends. - Fantasy Live Leaderboard - Track your selected drivers and garage picks in real time. - Swap drivers before Stage 3 and follow live scoring throughout the race NASCAR Fan Rewards - Earn points for engaging with NASCAR content and redeem rewards for prizes. - Video, Audio & Immersive Features Live Scanner Audio (All Series) - Listen to live driver, crew chief, and spotter communications during practice and qualifying. Driver Cards with Scanner Access - Jump directly into live scanner audio from Driver Cards. - View enhanced driver stats and performance dashboards. NASCAR Channel - 24/7 live NASCAR racing content and shows, streaming now in the Watch section. AR Masterclass - Free Augmented Reality experiences that explain NASCAR strategies and race moments. - High-fidelity 3D animations covering pit stops, drafting, race rules, and more. NASCAR Classics - Watch historical race replays and iconic NASCAR moments on demand. Weekend Planning & Insights - Weekend Schedule & Broadcast Tune-In - View full race weekend schedules for all NASCAR series. - Clickable broadcast logos make it easy to find race coverage. Additional features: - Driver, manufacturer, and owner standings. - Betting odds (where available). - Weather forecasts with hourly track conditions. Premium Features (Subscription Required) - Upgrade to NASCAR Premium with monthly or annual plans for the ultimate race-day experience: - No ads for uninterrupted viewing. - Enhanced Leaderboard stats across all NASCAR series. - Live Telemetry with real-time race data. - Premium Scanner access with unfiltered team communications. - NASCAR Officials Radio for race control updates. For your convenience, here are links to our terms of use and privacy policy: https://www.nascar.com/terms-of-use https://www.nascar.com/privacy-statement
Written user reviews are not shown here. Check current App Store reviews >
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
Incorporate more interactive features like quizzes or polls.
Assumption to check: Limited content outside of live races and news.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize app for better performance under high user load.
Assumption to check: Inconsistent performance during peak events.
Validate with people who use this workflow before building.
Hypothesis 3
Improve navigation with a more intuitive tab structure.
Assumption to check: Difficulty in navigating between sections.
Validate with people who use this workflow before building.
Hypothesis 4
Add features for users to customize their experience and follow favorite drivers more closely.
Assumption to check: Limited personalization options for users.
Validate with people who use this workflow before building.
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
Redux
Axios
BUILD KIT DIFFICULTY
Expert
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.
