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.
Transit Stop: CTA Tracker gives you quick and easy access to bus and train (‘L’) arrival time estimates for your favorite Chicago Transit Authority (CTA) stop.
Free · In-app purchases
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.
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.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Transit Stop: CTA Tracker.: 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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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
Assumption to check: Users report inaccurate arrival times.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization for favorite stops.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: App can be slow to update transit information.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: UI can feel cluttered with too much information.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Transit Stop: CTA Tracker gives you quick and easy access to bus and train (‘L’) arrival time estimates for your favorite Chicago Transit Authority (CTA) stop. ------------ Features Include: ~ Apple Watch integration - view estimated arrival times for the stops you've saved on your wrist! ~ Estimated Bus & Train Arrival Times - Includes arrival time estimates in minutes (e.g. 4 minutes) and time (e.g. 12:14pm) along with the route name, bus ID or train run number, distance to stop, direction of travel, destination and a time stamp when the estimated arrival times were last refreshed. ~ Location Map - In addition to the list of estimated arrival times you can view bus and trains locations and route patterns on a map. ~ Individual Vehicle Tracking - View estimated arrival times for upcoming stops for specific bus or train vehicles by tapping the row of the estimated arrival time of interest. ~ Save Stops - Ability to save the stops you use everyday for quick and easy access while you're on the go. ~ View Multiple Routes - Toggle the estimated arrival times to display only your selected route or you can view all the routes that service a particular stop. ~ CTA Service Alerts – View CTA route service alerts for whichever bus route or train line you're tracking. ~ Refresh – Estimated arrival times can be manually refreshed giving you the flexibility to update the arrival times exactly when you need them. ~ Real Time Tracking Data - Bus routes, train lines, stops and estimated arrival times are all provided directly from the CTA bus and train tracking systems. ------------ Transit Stop is not affiliated with the CTA.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.