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
Power Plugs and Sockets
Instantly look up the power plugs, sockets, voltage and frequency for every country and territory on Earth — 242 of them — and know before you fly whether you need an adapter.
$1.99
PRICE
$1.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included14 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.
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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 Power Plugs and Sockets: map the core Travel workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Instantly look up the power plugs, sockets, voltage and frequency for every country and territory on Earth — 242 of them — and know before you fly whether you need an adapter. Set your home country and Power Plugs compares every destination against it: whether your plugs physically fit the local sockets, whether the voltage matches, and whether the mains frequency differs — all in plain language. Features: - Plug, socket, voltage and frequency details for 242 countries and territories. - Travel advice: set your home country and instantly see whether you need an adapter or converter at your destination. - Clear illustrations of all 15 international plug types (A to O). - Compatibility guide for every plug and socket type. - Favorite the countries you travel to most. - Fast search by country name. - Native iPhone and iPad app with full dark mode support. - Works completely offline — no internet connection required, and no data ever leaves your device.
Written user reviews are not shown here. Check current App Store reviews >
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
Provide detailed descriptions and user reviews for each plug type.
Assumption to check: Limited information on plug types and voltages
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline caching for country data.
Assumption to check: No offline access to information
Validate with people who use this workflow before building.
Hypothesis 3
Introduce user-generated content like reviews and tips for each country.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 4
Create a guided onboarding process to help users navigate the app.
Assumption to check: Difficult to navigate for first-time users
Validate with people who use this workflow before building.
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.
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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.
