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
Warehouse Watcher Gold Tracker
Warehouse Watcher monitors Costco gold bar prices and alerts you the moment they drop close to spot price.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 Warehouse Watcher Gold Tracker: map the core Shopping 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 advanced search and filtering options.
Assumption to check: Users struggle with finding specific products quickly.
Validate with people who use this workflow before building.
Hypothesis 2
Provide clear indicators for cart items and total price.
Assumption to check: Cart management can be confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the checkout process with fewer steps.
Assumption to check: Checkout process is often lengthy and cumbersome.
Validate with people who use this workflow before building.
Hypothesis 4
Encourage user reviews to build trust and improve product visibility.
Assumption to check: Lack of user reviews and ratings on products.
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
Warehouse Watcher monitors Costco gold bar prices and alerts you the moment they drop close to spot price. FEATURES • Real-time price monitoring. Checks Costco prices automatically • Push notifications. Get alerted instantly when a deal appears • Premium % tracker. See exactly how much over spot each bar is priced • Price ceiling. Only get alerts when the price per ounce is at or below your limit • Watch specific products. Monitor only the bars you care about • No account required. Anonymous, private, and simple HOW IT WORKS Warehouse Watcher checks Costco's current gold bar listings and compares each price against the live spot price of gold. When a bar's premium drops below your threshold(s), you get a push notification immediately. Perfect for gold stackers who want to buy from Costco without constantly refreshing the page. PRIVACY No personal data is collected. No login required. Push notification tokens are stored anonymously and never shared. Disclaimer: This app is not affiliated with or endorsed by Costco Wholesale Corporation.
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
Zustand
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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.
