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
AI CoinScan: Coin ID & Value
AI CoinScan is your go-to AI-powered tool for effortless coin identification
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.1
974 ratings · Top 30%
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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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.
What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 AI CoinScan: Coin ID & Value: map the core Reference 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
Competitive pricing with generous free tier
Assumption to check: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Focus on most-requested features first
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Optimize for 60fps, fast load times
Assumption to check: Poor performance
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
AI CoinScan is your go-to AI-powered tool for effortless coin identification. Whether you're a passionate collector, a history enthusiast, or simply curious about the coins in your pocket, AI CoinScan offers a fast and accurate solution. Using cutting-edge AI technology, this app allows you to scan coins from different countries and time periods to instantly identify details like the year of issue, rarity, designer, and much more. Our app boasts a vast, global database of coins, making it easy to discover both common and rare coins from around the world. With just a simple scan, AI CoinScan gives you a deeper understanding of your coins, enhancing both your collection and your knowledge of numismatics. The user-friendly interface ensures a seamless experience, allowing you to identify coins with a single tap. Whether you’re sorting through your collection, browsing coins, or verifying the value of a piece, AI CoinScan is the ideal companion. Perfect for beginners and seasoned collectors alike, AI CoinScan turns every coin into an opportunity to learn and explore. Unlock the full potential of your collection today with AI CoinScan and let AI do the heavy lifting! Subscription unlocks all premium features of the app, including but not limited to an ad-free experience, faster cleaning speed, and additional storage space. The subscription will auto-renew unless canceled at least 24 hours before the end of the current subscription period. You can manage your subscription at any time through your App Store account settings. Key Features: AI-powered recognition for accurate coin identification Detailed information on year, rarity, designer, and more Extensive worldwide coin database Simple and intuitive interface for quick identification Ideal for collectors, hobbyists, and numismatists Ready to start scanning? Terms of use：https://sites.google.com/view/coinsnap/terms-of-use Privacy Policy：https://sites.google.com/view/coinsnap/privacy-policy
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
Supabase
RevenueCat
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.
