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
Contact Exporter - Backup CSV
Lose your contacts and you lose years of relationships
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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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What's included17 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Contact Exporter - Backup CSV: map the core Utilities 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
Introduce multiple export formats (e.g., vCard, TXT).
Assumption to check: Limited export options beyond CSV.
Validate with people who use this workflow before building.
Hypothesis 2
Add direct sharing capabilities (e.g., email, AirDrop).
Assumption to check: No direct sharing options after export.
Validate with people who use this workflow before building.
Hypothesis 3
Implement better filtering and search functions for large contact lists.
Assumption to check: Inaccessible for users who need larger contact list management.
Validate with people who use this workflow before building.
Hypothesis 4
Show progress indicators and completion notifications during the export.
Assumption to check: No user feedback during export process.
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
Lose your contacts and you lose years of relationships. Contact Exporter backs up every name, number, and photo on your iPhone — and exports them anywhere you need. On the App Store since 2011. Rebuilt for iOS 17. Export Without Limits • Excel, CSV, VCF, and TXT — pick the fields, the format, and the order • Photos exported with Excel and VCF, not just text • Export everyone, a handpicked few, or a whole group — your selections save for next time Clean Up the Mess • Catch duplicates, invalid emails, malformed numbers, and stray whitespace • Fix in one tap or review every change first • Phone numbers normalized to E.164 across 50+ countries Smart Import & Recovery • Drop in a VCF, CSV, XLSX, or ABBU and see what's new, what changed, and what's already there before anything is written • Restore from any backup — yours or someone else's, no questions asked Tools Beyond Export • Custom groups — family, clients, holiday list, project crew • Avery mailing labels, print-ready for invitations and business mail • Gravatar enrichment — adds real profile photos to anyone with an email • Monthly reminders and one-tap backup so you never forget Built private. Everything happens on your device. No accounts, no servers, no tracking. How It Works 1. Pick your contacts — all of them, a group, or specific ones 2. Choose your format and the fields you want 3. Tap export. Done. Back up your contacts today and stop hoping nothing breaks. Payment will be charged to your Apple ID at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your Account Settings on the App Store after purchase. Any unused portion of a free trial is forfeited when purchasing a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://BigBalli.com/privacy
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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
Zustand
React Navigation
FastAPI
iCloud
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.
