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
Contacts backup to vCard & csv
Easily and quickly backup your contacts with this app
$0.49 · In-app purchases
PRICE
$0.49
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
13 ratings · Top 50%
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 included15 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 Contacts backup to vCard & csv: map the core Business 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
Include additional formats like XML or PDF.
Assumption to check: Limited export formats available
Validate with people who use this workflow before building.
Hypothesis 2
Implement detailed error handling and user feedback.
Assumption to check: Inconsistent backup success
Validate with people who use this workflow before building.
Hypothesis 3
Add tooltips or a tutorial for first-time users.
Assumption to check: Lack of user guidance during export
Validate with people who use this workflow before building.
Hypothesis 4
Clearly outline premium features to justify the cost.
Assumption to check: Subscription value unclear
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
Easily and quickly backup your contacts with this app. Whether you are selling your mobile or purchasing a new handset you need to backup your contacts, this app makes this process easy by enabling you to send all your contacts and their related informations as vCard to your mail id. You can restore those contacts from the mail just by clicking on the vCard attachment and saving them. ************************* ***** FEATURES ***** ************************* ** Save contacts as .CSV or .VCF ** Save as vCard ** Mail contacts and backup them ** One click backup ** Save contacts as .csv in excel supported formats ** Exports all fields related to a contact (Name, Birthday, Email, Website, Dates, Postal Address, Phone Number, Job Title, Department, Social Profiles, Notes and many more) ** Set contact backup reminder ** Cross platform supported Note: We do not upload your contacts to our domain. All contacts are stored in your device on a temporary file.
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
Zustand
@react-navigation/native
expo-file-system
@react-native-async-storage/async-storage
BUILD KIT DIFFICULTY
Starter
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.
