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
Scan QR Code.
The #1 QR Reader - QR code scanning, made simple and easy.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
15,732 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 included17 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 Scan QR Code.: map the core Utilities 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 QR code recognition for various formats.
Assumption to check: Limited scanning features for certain QR codes
Validate with people who use this workflow before building.
Hypothesis 2
Implement a premium ad-free version.
Assumption to check: Ads may interrupt user experience
Validate with people who use this workflow before building.
Hypothesis 3
Add search and filter options for history.
Assumption to check: History management is basic
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize flashlight and scanning settings.
Assumption to check: Lack of customization options
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
The #1 QR Reader - QR code scanning, made simple and easy. Download now for FREE! FEATURES - QR Code Scanner - Create your own QR Codes - Barcode Scanner (Scan coupons & Food labels) - Share QR Codes - Auto Scan Use our app to scan any QR code and get the information you need fast! Create and share QR Codes for yourself and friends! Archive and save all QR Codes you have ever scanned or created. DISCLAIMER: By clicking “install”, I accept and agree to install Scan QR Code app and setting the application’s search functionality to that provided by the service and the Terms of Use and Privacy Policy. The app will update in-app search settings to Yahoo. * SUBSCRIPTIONS You can subscribe to Scan QR Code. to get access to premium features, like unlimited scans, code creation, and more. Options: - 3-day free trial, then renews weekly for $9.99 * Link to Terms of Use: https://scanqrcodeapp.com/terms.html * Link to Privacy Policy: https://scanqrcodeapp.com/privacy.html
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
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BUILD KIT DIFFICULTY
Starter
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.
