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
QR Master - Creator
QR Master: Your Ultimate QR Code Scanner & Generator - Effortless, Secure & Customizable!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
1,447 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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What's included15 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 QR Master - Creator: map the core Productivity 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
Add options to categorize or tag QR codes.
Assumption to check: Limited functionality for managing QR codes
Validate with people who use this workflow before building.
Hypothesis 2
Provide more value in the free tier.
Assumption to check: In-app purchase barriers for advanced features
Validate with people who use this workflow before building.
Hypothesis 3
Implement better handling for large inputs.
Assumption to check: Difficulty in generating QR codes for complex data
Validate with people who use this workflow before building.
Hypothesis 4
Integrate with more social platforms for sharing.
Assumption to check: Limited sharing 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
QR Master: Your Ultimate QR Code Scanner & Generator - Effortless, Secure & Customizable! Stop juggling apps! QR Master is your sleek, all-in-one solution for everything QR codes. Whether you need to scan instantly or create dynamically, we make it lightning-fast and incredibly simple. Why You'll Love QR Master: 1.Scan Anything, Instantly: - Unlock links, view menus, connect to Wi-Fi, save contacts, dial numbers – point your camera and go! - Blazing fast recognition – Get the info you need without the wait. - Automatic detection – Seamlessly scans codes within your viewfinder. 2.Create Powerful QR Codes Effortlessly: - Generate vibrant QR codes for anything: Text, Website URLs, Wi-Fi Network Logins (share your Wi-Fi securely!), Email Drafts, SMS Messages, Precise Map Locations, Detailed Contact Cards (vCards), Phone Numbers, and much more! - Perfect for Everyday & Business: Share contact details seamlessly, promote your website, make Wi-Fi access a breeze for guests, or send pre-drafted messages. 3.Your Secure QR Code Vault: - All scans and creations are saved locally on your device. Your data stays private, under your control – no cloud storage required. - Easily search, revisit, share, or download your QR code history anytime. Never lose that important link again! 4.Stand Out with Style: - Customize your creations! Go beyond boring black & white. Personalize QR codes with different colors to match your brand, style, or just for fun. Make them uniquely yours! 5.Supercharge Your Asset Management (For Professionals & DIYers): - Effortlessly track equipment, tools, or inventory! Generate durable QR code labels for asset numbers. - Print & Stick: Attach them to devices, machinery, or valuables. - Instant Access: Anyone with a phone can scan the code to instantly pull up the asset's details, maintenance history, or location notes. Revolutionize how you manage your stuff! QR Master: More Than Just a Scanner, It's Your Productivity Partner. Download QR Master Today For Free! Experience the fastest, most versatile, and privacy-focused way to handle QR codes on your iPhone.
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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
React Navigation
React Native Paper
Async Storage
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.
