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
Simple Backup Contacts Pro
“Simple Backup Contacts” is the easiest way to backup and restore your contacts all from your phone without needing a computer or synchronization.
$0.99 · In-app purchases
PRICE
$0.99
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 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 Simple Backup Contacts Pro: map the core News 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
Implement a more reliable backup system with versioning.
Assumption to check: Users often report lost contacts during backup
Validate with people who use this workflow before building.
Hypothesis 2
Include options to select specific contacts to restore.
Assumption to check: Limited features for restoring contacts
Validate with people who use this workflow before building.
Hypothesis 3
Enable local storage of backups for offline access.
Assumption to check: No offline access to backups
Validate with people who use this workflow before building.
Hypothesis 4
Add an onboarding tutorial to guide users through backups and restores.
Assumption to check: Lack of user guidance for first-time 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
“Simple Backup Contacts” is the easiest way to backup and restore your contacts all from your phone without needing a computer or synchronization. You can backup all your contacts with a single touch and send yourself as a .vcf attachment via email. All contacts can then easily be restored any time by simply opening .vcf file in your mailbox. Key Features: * Offline Backup. No need to sync to any server. Just email the backup file to yourself. * Easy restore. No need to use any app to restore backup file. Just tap on the *.vcf backup file in the iPhone, iPod Touch or iPad mail client. * Easily transfer contacts between iOS Devices using just email client. * Backup Contacts as VCF (VCard
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 Navigation
AsyncStorage
Expo FileSystem
@react-native-async-storage/async-storage
React Native Vector Icons
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.
