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
Coin Identifier - CoinCheck
CoinCheck is your ultimate tool, designed to satisfy your curiosity and enhance your coin collection experience
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
12,507 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 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 Coin Identifier - CoinCheck: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
CoinCheck is your ultimate tool, designed to satisfy your curiosity and enhance your coin collection experience. Discover the true potential of each coin in your collection and unlock a world of numismatic knowledge with just a snap! How it works: 1. Snap or Upload: Begin by taking a photo of the coin with your phone camera or uploading an existing image from your gallery. 2. AI Analysis: Our AI technology quickly analyzes the image, comparing it against a comprehensive database to accurately identify the coin. 3. Instant Results: Within moments, receive detailed information about the coin, including its name, origin, year of issue, and other unique characteristics. 4. Valuation: The AI goes a step further to provide an estimated market value, helping you understand the worth of your coin in real-time. This process is designed to be both intuitive and efficient, making it easy for anyone, from casual enthusiasts to serious collectors, to uncover the rich stories and values of their coins with minimal effort. Key features: • Fast and accurate coin recognition • Know the price and value of your coins • Identify rare coins • Extensive information about coins from all over the globe • Categorize and track your collection • Up-to-date reference prices • Easy-to-use interface CoinCheck is your gateway to the fascinating world of numismatics, suitable for collectors at all levels of expertise. Download now and start discovering the unique stories and values of each coin in your collection. Subscription pricing and terms: CoinCheck offers the following auto-renewing subscriptions to provide you with unlimited access to identification and database within Coin Identifier Premium Plan while you maintain an active subscription: Weekly with a 3-day trial at $5.99; Weekly at $5.99; Monthly at $12.99; Yearly with a 3-day trial at $29.99; Yearly at $29.99; Lifetime at $49.99. For other currencies, the price corresponds to the same price tier on the App Store Pricing Matrix. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. If you have any questions or suggestions on how we can improve the application, please do not hesitate to contact us. Read more about our terms and conditions here: Privacy Policy: http://www.macrotapapps.com/privacy-policy-apps.html Terms of Use: http://www.macrotapapps.com/TermsOfUse.html
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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 the database with user contributions and community engagement.
Assumption to check: Limited coin database leading to missed identifications
Validate with people who use this workflow before building.
Hypothesis 2
Optimize the image recognition algorithm for faster results.
Assumption to check: Occasional slow image recognition
Validate with people who use this workflow before building.
Hypothesis 3
Integrate more social sharing features to enhance user engagement.
Assumption to check: Limited sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline access to previously identified coins.
Assumption to check: No offline functionality
Validate with people who use this workflow before building.
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
react-navigation
axios
expo-camera
react-native-reanimated
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.
