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
Maryland Roads Traffic
Live traffic reports and video cameras for Maryland
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
57 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'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 Maryland Roads Traffic: 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 user-submitted data for better coverage
Assumption to check: Limited coverage of traffic data in rural areas
Validate with people who use this workflow before building.
Hypothesis 2
Optimize data fetching and caching mechanisms
Assumption to check: Occasional lag in real-time updates
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a freemium model with basic free features
Assumption to check: Subscription model may deter users
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI for better usability and navigation
Assumption to check: User interface can feel cluttered
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
Live traffic reports and video cameras for Maryland. One time purchase, no subscription required. The app was updated during December 2025. KEY FEATURES: MAP VIEW - Shows current incidents and traffic video cams. - Each incident is color coded as well as being represented by an icon showing the incident type. - Clicking on an incident displays more detail right there on the map. - The map view can also show live traffic videos. LIST VIEW - Shows current incidents in order of distance from your current location (closest incidents are shown first). - Each incident is color-coded to indicate the severity of the delay. - You can quickly see the distance the incident is from you, the road name and the type of incident. - The detail view shows the description together with a map showing the location. - Full search functionality, works across both the list and map views. TODAY WIDGET - Shows at a glance the nearest current traffic incidents without launching the app. PERSONALISE - Toggle traffic information on the map. - Toggle always show map on app launch. - You can configure which incidents are displayed according to the severity of the delay caused. - Kilometres or Miles setting. Optimised for all iPhone and iPad models. CONTACT - Email me for feature requests/bug reports etc. I would love to hear from you! Data courtesy of the Maryland Department of Transportation.
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
Supabase
react-navigation
react-native-maps
axios
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.
