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
Just Cards: Loyalty Wallet
Just a place for your cards.
$2.00
PRICE
$2.00
No 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 included
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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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
Just a place for your cards. Keep your loyalty, membership, gift, and other everyday cards in one clear, colorful library. Open a card when you need its barcode, and leave the plastic behind where your card issuer accepts digital copies. NO SIGN-UP. NO ADS. NO AD TRACKING. Start using Just Cards without creating a separate account. There are no ads, subscriptions, or advertising trackers. Just Cards is a one-time App Store purchase. ADD IT YOUR WAY Scan a supported barcode with your camera, import a barcode image from Photos, or enter card details manually. Barcode recognition happens on your device. READY WHEN YOU NEED IT Give each card a name and color, organize your library, and keep frequently used cards in Favorites. Open a saved barcode for a clear presentation at the reader. Your saved cards remain available on your device when you are offline. FAVORITES, ONE TAP AWAY Put selected cards on your Home Screen or Lock Screen with Just Cards widgets. Tap a widget card to open it in the app. YOUR CARDS, UNDER LOCK Choose App Lock to protect access with device authentication, including Face ID or your device passcode. Accidentally deleted a card? Recover it from Recently Deleted within 30 days unless you permanently delete it sooner. ICLOUD AND SHARING With an available iCloud account, your library syncs through Apple's private iCloud storage. Share selected cards through a card file or an iCloud invitation. Sync and iCloud sharing require iCloud and an internet connection. Share only cards you want the recipient to use. ANALYTICS ARE YOUR CHOICE Optional usage analytics are off until you allow them. Declining does not restrict card features. If enabled, limited app-usage events and random identifiers go to PostHog; your card contents are not included. Change your choice in Settings at any time. Available in English, French, Slovak, and Spanish. Just Cards stores and presents cards. It is not a payment service and does not manage gift-card balances or issuer reward accounts. Digital-card acceptance depends on the issuer and barcode reader. Support: [email protected] Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kresanic.notion.site/jc-pp
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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.
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
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
