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
COtrip Planner
The COtrip app is the Colorado Department of Transportation's (CDOT) official real-time traffic and traveler information app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.9
726 ratings · Below Average
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 COtrip Planner: map the core Reference 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-generated reports for real-time updates.
Assumption to check: Limited user feedback on road conditions
Validate with people who use this workflow before building.
Hypothesis 2
Simplify layout and improve navigation for key features.
Assumption to check: Cluttered interface with too much information
Validate with people who use this workflow before building.
Hypothesis 3
Enhance backend to ensure timely updates and notifications.
Assumption to check: Inconsistent update frequency of alerts
Validate with people who use this workflow before building.
Hypothesis 4
Add a guided onboarding process to familiarize users with the app.
Assumption to check: Difficulties in finding specific features
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
The COtrip app is the Colorado Department of Transportation's (CDOT) official real-time traffic and traveler information app. The COtrip app provides statewide travel information for Colorado’s interstates, U.S. routes and state highways. It does not include information for county roads or city streets. Features: - Zoomable and mobile-friendly map display - Traffic speeds and road conditions - Real-time updates on road maintenance, construction, restrictions and road closures - Camera images and live streaming video - Trucker mode with resources specific to commercial motor vehicle operators - Winter weather conditions (seasonal) - Plow tracker - Hands-free, eyes-free feature to announce upcoming road conditions that will impact your route Please Note: Continued use of GPS running in the background can decrease device battery life. Drop the Distraction The primary responsibility of every driver is the safe operation of their vehicle. While traveling, mobile communication devices should be used only when the motor vehicle is at a complete stop off the traveled portion of the roadway. Do not text and drive (it's against the law) or use this app while driving. For more information about distracted driving in Colorado and safety tips, visit https://distracted.codot.gov. Feedback We welcome your feedback on this app. Please send your suggestions, questions or concerns in an email to [email protected]. For tutorials and more information, visit COtrip.org. CDOT Privacy Policy: https://codot.gov/topcontent/privacypolicy
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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
React Native Maps
Zustand
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.
