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
CardVault
CardVault is your ultimate digital loyalty card manager designed for simplicity, speed, and privacy
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 CardVault: map the core Shopping 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
Implement a review system for user feedback and ratings
Assumption to check: Lack of user reviews and feedback
Validate with people who use this workflow before building.
Hypothesis 2
Add features like reminders for card renewals and auto-fill options
Assumption to check: Limited functionality for managing card details
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a powerful search function with filters and categories
Assumption to check: Difficulty in finding specific cards
Validate with people who use this workflow before building.
Hypothesis 4
Enable cloud syncing for user accounts and card information
Assumption to check: No support for syncing across devices
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
CardVault is your ultimate digital loyalty card manager designed for simplicity, speed, and privacy. With a one-time purchase and no recurring fees, you can manage all your loyalty cards without the burden of subscriptions or hidden costs. Say goodbye to bloated apps, intrusive ads, and unnecessary features—CardVault puts you in control. Key Features: • Effortless Management: Organize all your loyalty cards in one convenient app. • Easy Additions: Quickly add cards by scanning them or importing from images—perfect for transferring cards from other apps. • Instant Access: Enjoy fast, secure access to your cards whenever you need them. • Home Screen Widget: Display up to six cards directly on your home screen for even quicker access. • Custom Organization: Color code your cards to easily identify them at a glance. • Privacy First: Your data remains entirely on your device—no ads, no tracking, and absolutely no selling of your information. • One-Time Purchase: Pay once and enjoy CardVault forever—no subscriptions, no recurring fees, and no hidden costs. Our Story: I built CardVault after my favorite loyalty card manager was replaced by a bloated, ad-ridden alternative that compromised on usability and privacy. CardVault was created to bring back a focused, fast, and user-friendly experience—an app solely dedicated to managing your loyalty cards the simple and secure way. Download CardVault today and experience the difference of a truly private, streamlined loyalty card manager.
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-image-picker
BUILD KIT DIFFICULTY
Intermediate
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.
