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
NJ TRANSIT
All of NJ TRANSIT
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
269,547 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.
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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/
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 NJ TRANSIT: map the core Travel 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 a more streamlined navigation system with clear labels.
Assumption to check: Users find it difficult to navigate between different ticket types and schedules.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize API calls and implement caching for faster access.
Assumption to check: Loading times can be slow when fetching schedules and tickets.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate multiple payment gateways to enhance user convenience.
Assumption to check: Limited payment options available for purchasing tickets.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a push notification system for real-time alerts on delays or changes.
Assumption to check: Users report issues with real-time schedule updates.
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
All of NJ TRANSIT. One place. The NJ TRANSIT Mobile App makes it easy to get where you need to go—whether you're commuting daily or traveling occasionally. Plan trips, purchase tickets, and stay informed with real-time updates across bus, rail, and light rail. • Plan Your Trip with Confidence - Get where you're going faster with easy trip planning across all NJ TRANSIT services. Find the best routes, connections, and schedules in seconds. • Real-Time Travel Information - Stay informed every step of the way with live schedules, arrival times, and service updates so you can plan ahead and adjust as needed. • Buy & Manage Tickets Easily - Purchase tickets securely and store them right in the app. Manage your tickets anytime without waiting in line. • Activate When You’re Ready to Ride - Quickly activate your tickets just before boarding for a smooth, contactless experience. • Track Your Ride - See live arrival times and track your trip so you always know when your ride is approaching. • Stay Informed with Alerts - Receive notifications about delays, service changes, and important travel updates to keep your commute on track. Whether you're heading into New York City, traveling across New Jersey, or exploring along the way, the NJ TRANSIT Mobile App gives you everything you need for a smarter, more convenient ride. Download today and take control of your commute.
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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
Supabase
React Navigation
Axios
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.
