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
ScanCoin: identify & check
Introducing ScanCoin - a cutting-edge mobile application that simplifies the lives of coin collectors worldwide
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
8,544 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 ScanCoin: identify & check: 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
Introducing ScanCoin - a cutting-edge mobile application that simplifies the lives of coin collectors worldwide. Utilizing AI-driven image recognition technology, ScanCoin can identify over 200,000 species of coins within seconds. All you need to do is take a picture of your coin or upload an image from your phone's gallery, and let ScanCoin do the rest. The application's vast database offers comprehensive details on each coin, such as its name, country of origin, year of issue, coin populations, and more. But there's more to ScanCoin than just identification. The app also features a coin grading tool and provides reference prices for each coin, allowing users to make informed decisions regarding their coin's value. With this feature, users can buy, sell, or trade their coins confidently. Furthermore, ScanCoin enables users to store their coin collections directly within the application, making it easier to keep track of their collections and their total coin value. The app also allows users to organize their collections by coin series, allowing them to stay up-to-date with the latest trends in coin collecting. ScanCoin has something to offer for both novice and experienced coin collectors. Download the application today and unlock all its features. With high-quality photography, accurate identification results, and the ability to identify rare and error coins, ScanCoin is the perfect tool for coin enthusiasts everywhere. Please be advised that our privacy policy and terms and conditions apply. Privacy Policy: https://legal.scancoinapp.com/privacy-policy.html Terms of Use: https://legal.scancoinapp.com/terms-of-service.html Contact us: [email protected]
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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 community contributions and crowdsourcing.
Assumption to check: Limited coin database leading to incorrect identifications.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the purchase flow and provide clear benefits for each tier.
Assumption to check: In-app purchase complexity can confuse users.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image recognition algorithms for faster processing.
Assumption to check: Slow camera processing times can lead to user frustration.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce features to save favorite coins and view scan history.
Assumption to check: Lack of user engagement features like favorites or history.
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
Zustand
Supabase
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.
