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
Card Vault - Digital Wallet
Welcome to CardVault, where the convenience of online shopping meets unmatched security for your card details
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.0
1 ratings · Below Average
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/
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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 Card Vault - Digital Wallet: map the core Finance 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 features like transaction categorization and budgeting.
Assumption to check: Limited functionality compared to other digital wallet apps
Validate with people who use this workflow before building.
Hypothesis 2
Focus on user interface improvements and better onboarding.
Assumption to check: Poor user ratings indicate usability issues
Validate with people who use this workflow before building.
Hypothesis 3
Include support for multiple card types and payment services.
Assumption to check: Missing support for popular payment methods
Validate with people who use this workflow before building.
Hypothesis 4
Clarify features available in free vs paid versions.
Assumption to check: In-app purchase model may confuse users
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
Welcome to CardVault, where the convenience of online shopping meets unmatched security for your card details. Say goodbye to the hassle of searching for your wallet and typing out card numbers. CardVault is here to revolutionize the way you shop. Why CardVault? All-in-One Secure Storage: Keep all your bank cards securely in one place, easily accessible whenever you need them. No More Typing: With CardVault, your card information is just a tap away, ready to autofill during online purchases. On-Device Security: We prioritize your privacy. Your card details are stored locally on your device and locked within the Apple Keychain for top-notch security. No Cloud, No Worries: With no cloud storage and no third-party libraries, your information stays on your device and nowhere else. Sleek and Simple: Our user-friendly interface makes managing your cards not just secure, but a visually pleasing experience. Key Features: Instant Card Access: Retrieve your card details with a single tap, and use them to shop online without the need for physical cards. Swipe to Manage: Easily add, view, or delete cards with intuitive swipe gestures. Secure Back-Up: Confidently back-up your cards, knowing they're protected by the reliability of Apple Keychain. Offline Accessibility: Access your cards anytime, anywhere, with or without internet access. Free Updates: We continually refine our app to enhance your experience, providing regular updates without any additional cost. Your Trust, Our Commitment We are committed to transparency and your privacy. CardVault doesn't use third-party analytics or ad libraries, ensuring your personal data never leaves your device. Join the CardVault family today and experience the ultimate convenience in online shopping!
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
React Navigation
React Hook Form
React Native Paper
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.
