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
Exit51
Exit51 is the social app built for car enthusiasts
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
241 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.
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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/
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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 Exit51: 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
Implement offline map downloads and routing.
Assumption to check: Limited offline functionality for navigation
Validate with people who use this workflow before building.
Hypothesis 2
Use real-time traffic API for more accurate data.
Assumption to check: Inconsistent update frequency for traffic data
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to categorize and label saved places.
Assumption to check: Lack of customization for favorite places
Validate with people who use this workflow before building.
Hypothesis 4
Offer more flexible payment options or a freemium model.
Assumption to check: Subscription pricing may deter users
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
Exit51 is the social app built for car enthusiasts. Connect with your crew, show off your builds, and explore the road together. Exit51 requires a paid Exit51 Pro subscription to use. Every feature listed below is part of Exit51 Pro. It's auto-renewing. Cancel anytime. WHAT'S INCLUDED IN EXIT51 PRO • See your crew live on the map with Ghost Mode privacy controls • Start convoys and set shared destinations for group drives • Build your digital garage with multiple vehicles and detailed mods • Explore new roads to unlock your personal fog-of-war map • Track your distance explored, trips, and personal stats • Compete on leaderboards with your crew and the wider community • Customize privacy controls for your profile and location Whether you're into classics, sports cars, or tuned builds, Exit51 is where car culture lives. Terms of Use: https://exit51.vexia.digital/terms-of-service Privacy Policy: https://exit51.vexia.digital/privacy-policy
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
react-navigation
axios
react-native-maps
redux
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.
