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
WorldCard Mobile
Wall Street Journal recommends it to all professionals
$29.99 · In-app purchases
PRICE
$29.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.8
32 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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.
JavaScript is required to complete mailbox verification.
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 WorldCard Mobile: map the core Business workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Focus on improving onboarding and user guidance.
Assumption to check: Poor user ratings indicate usability issues.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance image processing algorithms for better OCR.
Assumption to check: Limited scanning accuracy reported by users.
Validate with people who use this workflow before building.
Hypothesis 3
Offer a more competitive pricing strategy with a free tier.
Assumption to check: High price point compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 4
Implement cloud storage for contacts and cross-device syncing.
Assumption to check: Lack of advanced features like cloud syncing.
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
Wall Street Journal recommends it to all professionals. Grab it, manage your contacts. ◆ Awards and Laurels ◆ - Named Best Mobile App OCR by 2010 MOBI Awards - Winner of the CTIA 2010 E-Tech Award for Mobile Applications - Pro-sumer/Business Productivity - Secured a spot among the Top 10 apps in the Business category in 194 countries - Ranked #1 Business app in US App Store - Ranked #1 Business Card Scanning application in Macworld.com - The preferred business card management tool of mobile phone developers like HTC, telecommunications companies such as CHT/Taiwan Mobile and CRM developers like JustSystems - Over 20 million users worldwide ◆ Testimonials ◆ - “For scanning business cards onto your iPhone, WorldCard Mobile stands out.” – Macworld - “I’ve always been skeptical about contact capturing technologies…but I’m an overnight convert - [WorldCard Mobile] changed my outlook (pun intended).” - Bill French, iPhone CTO - “WorldCard Mobile accurately read and sorted fax and mobile numbers, even when the cards labels used short-hand.” - Bob Tedeschi, New York Times ◆ App Description ◆ WorldCard Mobile, the leading business card scanning application for iPhone, uses OCR (Optical Character Recognition) technology to instantly transfer information from business cards to users' native contacts. With a simple click of the camera, you no longer have to manually input contact info from business cards or email signatures. ◆ Why WorldCard Mobile? ◆ - Capture business cards anytime & anywhere. - Capture business card images with the iPhone’s camera. - Recognition of 26 languages: English, French, German, Italian, Spanish, Portuguese, Dutch, Czech, Greek, Hungarian, Polish, Portuguese (Brazil), Russian, Slovak, Spanish (Mexico), Turkish, Finland, Sweden, Denmark, Norway and Arabic, Traditional Chinese, Simplified Chinese,Japanese, Korean. - Sort recognized information by name, position, company, phone number, fax number, address or other fields. ◆ Manage contacts easily ◆ - View and manage contact info with Card holder function. Make a phone call, send SMS and email to your contacts directly. - Provide nearby contacts function help you visit contacts easily - Select partially and recognize the specific area that contains the correct data. - Find your contacts on Facebook, LinkedIn and Twitter. Expand your social and professional networks. - Support cover flow function in landscape mode ◆ Smart functions for your business * - Exchange contact data through Open In, Mail and iTunes File Sharing. Import/export or backup your data on Mac/Windows quickly and conveniently. - Share or backup your contacts via cloud services (iCloud / Dropbox). Manage your contacts on all devices, such as Mac or Windows PC. - Recognize QR code to get more information easily. - Copy email signatures and add them to your contact lists.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
expo-camera
@react-native-async-storage/async-storage
@supabase/supabase-js
BUILD KIT DIFFICULTY
Advanced
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.
