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 - CoinScan
CoinScan - your all-in-one coin identification and collection manager, powered by AI image recognition technology.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
8,185 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 Coin Identifier - CoinScan: 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
Enhance the database with user-contributed coins.
Assumption to check: Limited coin database leads to identification failures
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image processing algorithms for faster results.
Assumption to check: Slow image processing time
Validate with people who use this workflow before building.
Hypothesis 3
Improve performance and stability for older device compatibility.
Assumption to check: Occasional crashes on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social features to allow users to share their coin discoveries.
Assumption to check: Lack of community features for sharing finds
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
CoinScan - your all-in-one coin identification and collection manager, powered by AI image recognition technology. Whether you're a numismatic expert or just embarking on your coin collecting journey, CoinScan is the perfect companion to enhance your experience. KEY FEATURES: ►Coin Identification Snap a picture or upload an image from your gallery, and CoinScan will identify any coin, be it rare, foreign, or even error coins. ►Detailed Information Each identification provides a thorough overview of the coin, including its name, country of origin, year of issue, value, metal composition, and more. ►Coin Market Price You will understand the value of your coins and make informed decisions about purchases, sales, or trades. ►Personal Coin Collections Record and store your collections within the CoinScan app. You'll never lose track of your collectibles and will always be aware of their value. Arrange your collections as you see fit. ►AI Assistant Have any questions about a coin? Our AI assistant is here to guide you and answer all your queries, making your coin exploration seamless and enjoyable. ►Note-Taking Document your findings, insights, or any crucial information about your coins with our easy-to-use note-taking feature. ►Explore Collections Discover various coin collections from around the world, broadening your numismatic knowledge and providing inspiration for your own collection. With CoinScan, every coin in your pocket becomes a fascinating story to tell. Embrace the exciting world of numismatics – download now and start your coin collecting adventure today! Key Features Summary: ►Snaps and recognizes any coin fast with AI help ►Tells you all about your coin, even if it's rare or has errors ►Features an AI assistant ready to answer all your coin-related questions ►Grades your coin just from a photo ►Shows the current price of your coin ►Lets you record and organize your coin collection in the app ►Adds up the total value of your coins ►Makes learning fun with interesting coin facts ►Easy to use for everyone CoinScan it's a complete solution for coin enthusiasts of all levels. Download now and unlock its powerful features! With a Premium Subscription, you will have access to ALL premium features. We would be excited to receive your suggestions for future features of the app or database additions or any feedback you may have! Please email us at [email protected] Privacy Policy: https://bit.ly/privacy-policy-coin-scan Terms of Use: https://bit.ly/terms-of-use-coin-scan
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
Zustand
react-navigation
expo-camera
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.
