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
Wire Gauge Charts - Size tables for AWG, SWG, BWG
An easy-to-use set of charts giving diameter, area, resistance,and weight values of various wire gauge types
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
4 ratings · Top 30%
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 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.
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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 Wire Gauge Charts - Size tables for AWG, SWG, BWG: map the core Reference 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
Add features like user-customized charts or favorites.
Assumption to check: Limited functionality may not engage users long-term.
Validate with people who use this workflow before building.
Hypothesis 2
Consider a one-time purchase instead of subscriptions.
Assumption to check: Paywall for saving can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce interactive elements like comparisons or calculations.
Assumption to check: Lack of interactivity in charts.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a search/filter function for charts.
Assumption to check: Difficult to find specific gauges quickly.
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
An easy-to-use set of charts giving diameter, area, resistance,and weight values of various wire gauge types. No typing required, just tap the required gauge type, and scroll through the chart to find your wire gauge. Wire gauge types include: • AWG (American Wire Gauge) / B & S (Brown & Sharpe Wire Gauge) • SWG (Standard Wire Gauge) • BWG (Birmingham Wire Gauge) / Stubs Iron Wire • W&M (Washburn & Moen) / Steel Wire Gauge Comparison Tables: • Used to compare wires between the various size types. These tables are ordered by diameter and area. Resistance and weight tables are given for wires: • Aluminum wire of American Wire Guage • Copper wire of American Wire Guage General Features: • Search Bar • If you prefer not to scroll, you can find what you're looking for with the search bar at the top of every table. • All Device Orientations Supported • The app can be used in both landscape and portrait orientations, as well as upside-down. • Universal App • This means you only need to buy it once to be able to install it on all your devices (iPhone, iPod Touch, and iPad). If you find this app useful, please leave a review on the App Store. If you have suggestions, feature requests, or need support, feel free to contact us through the Settings menu within our apps.
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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
React Navigation
Zustand
Expo Clipboard
Expo Sharing
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.
