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
APMEX: Buy Gold & Silver
buy gold and silver quickly and securely with the apmex mobile app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
56,087 ratings · Top 5%
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 APMEX: Buy Gold & Silver: map the core Finance 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
Provide tutorials and guidance within the app.
Assumption to check: Limited educational resources for beginners on precious metals investing.
Validate with people who use this workflow before building.
Hypothesis 2
Offer a fee comparison tool or a subscription model with reduced fees.
Assumption to check: High transaction fees for purchases.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize alerts for price drops or news.
Assumption to check: Lack of personalized notification settings.
Validate with people who use this workflow before building.
Hypothesis 4
Include more detailed analytics and visual representations of investment history.
Assumption to check: Difficulty tracking long-term investment trends.
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
buy gold and silver quickly and securely with the apmex mobile app. apmex is one of the world's leading retailers in gold, silver, platinum, and palladium. quickly review the latest precious metals news and stay up to date on the current gold price or silver price with live spot charts. set up custom market alerts to track the price of gold and silver. then, shop our wide selection of bullion and collectible products and purchase directly on the app. apmex offers thousands of gold, silver, platinum, and palladium products, including coins and bars in various sizes, from the most trusted mints around the world. shop gold and silver buy precious metals from anywhere through our easy-to-navigate mobile app. browse our entire catalog, including thousands of gold, silver, platinum, and palladium products as well as investment-grade bullion and rare collectible coins. secure checkout providing a secure and quick checkout process is our top priority. we use the latest security measures and technologies to keep our customers' purchases and personal information safe. stay informed the market is always on the move and, with our precious metals news section, customers will be able to keep up to date with the latest precious metals news and market reports. also, track the price of gold and silver with our live spot price charts to see real-time changes in the price of precious metals. price alerts never miss a significant gold or silver price movement with customizable market alerts. use alerts and price charts to identify potential buying opportunities at any time. exclusive offers view current promotions and deals, including app-only offers, to never miss a sale. browse vault deals to shop our best offers on gold, silver, platinum, and palladium. manage account our mobile app gives customers access to their apmex account on the go. check the current value of individual precious metals holdings with our portfolio tool, view order history, and more.
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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
Zustand
Axios
Victory Native
React Navigation
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.
