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
USFS & BLM Campgrounds
This app shows over 5,640 United States Forest Service (USFS) and Bureau of Land Management (BLM) campgrounds throughout the USA.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
4,311 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 included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 USFS & BLM Campgrounds: 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
Enhance filtering by amenities, user ratings, and price ranges.
Assumption to check: Limited filtering options for campgrounds
Validate with people who use this workflow before building.
Hypothesis 2
Implement a user-generated content system for real-time updates.
Assumption to check: Inconsistent data on campgrounds
Validate with people who use this workflow before building.
Hypothesis 3
Add offline caching for campgrounds details using local storage.
Assumption to check: No offline access to campground information
Validate with people who use this workflow before building.
Hypothesis 4
Implement an in-app messaging system for inquiries.
Assumption to check: Limited communication between users and campground managers
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
This app shows over 5,640 United States Forest Service (USFS) and Bureau of Land Management (BLM) campgrounds throughout the USA. These types of campgrounds tend to be low cost or free. Each location displays the campground name, which agency administers it (BLM or USFS), the local weather, elevation, Internet images and searches of the campground, Flickr geotag search, and more. Easily locate the campgrounds nearest you. Send location data directly to our Road Trip Planner app. Import routes from GPX files. This makes it much easier to find locations along your route. - No subscription fees; just a one-time purchase. - Show a route between your location and the campground. - Map layers include Apple, Google, and Open Street Maps. - No Internet connection required to view campground locations and info. - View Flickr photos of each location (if they exist). - View current weather of each location. - Database is updated monthly, subject to user submissions.
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
Axios
React Navigation
MapView
React Query
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.
