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.
Tennessee is layered with history—and much of it is hiding in plain sight, on roadside markers most of us drive right past
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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.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
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 Tennessee Historical Markers: 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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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: Limited marker information and images
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline access to markers
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User discovery of markers is not personalized
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app navigation is not intuitive
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.
Tennessee is layered with history—and much of it is hiding in plain sight, on roadside markers most of us drive right past. Tennessee Historical Markers puts more than 8,500 of them in your pocket, from Civil War battlefields and frontier stations to the birthplaces of music legends and the landmarks of the civil rights movement. Open the map and watch the whole state light up. Tap any marker to read its full inscription, see a photo, and learn the story behind the spot. Find what's near you, get directions, and keep track of every marker you visit along the way. WHAT YOU CAN DO • Browse 8,500+ markers statewide on a fast, clustered map • Find markers near your current location • Read complete marker inscriptions and view photos • Get directions to any marker in one tap • Log the markers you've visited and add your own notes • Sync your visits across devices with a free account—or use the app offline, no sign-in required EXPLORE BY GRAND DIVISION Three stars, three Grand Divisions—West, Middle, and East—organize your journey across the state, just like the Tennessee flag. DISCOVER EVERY KIND OF STORY • Civil War • African American Heritage • Native American • Music & Culture • Pioneer & Settlement • Politics & Government Whether you're a lifelong Tennessean, a weekend road-tripper, a teacher, or a history buff, Tennessee Historical Markers turns an ordinary drive into a tour through the people, places, and moments that made the Volunteer State. Historical marker data provided by HMdb.org.
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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.