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
Electrician's Helper
Electrician’s Helper will take the hassle out of looking up electrical codes and doing complex calculations for installations.
$12.99 · In-app purchases
PRICE
$12.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
13 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 included18 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 Electrician's Helper: map the core Productivity 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
Allow users to personalize their dashboards and task views.
Assumption to check: Limited user customization options
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing or team task management features.
Assumption to check: No collaboration features for teams
Validate with people who use this workflow before building.
Hypothesis 3
Implement local storage for offline task management.
Assumption to check: Lack of offline capabilities
Validate with people who use this workflow before building.
Hypothesis 4
Offer a free trial period to attract more users.
Assumption to check: High initial cost with no trial
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
Electrician’s Helper will take the hassle out of looking up electrical codes and doing complex calculations for installations. With Electrician’s Helper you can... ● Calculate voltage, current and power in 3 phase delta and wye circuits. ● Find the ampacity of a conductor as per the NEC and CEC tables. ● Calculate the voltage drop in a line based on length, size, current and temperature. ● Find the total box fill by entering the size and number of conductors, straps and clamps. ● Find the maximum number of conductors allowed in a particular size raceway based on NEC and CEC rules. ● Determine what size raceway is needed for a bundle of conductors. ● Find the maximum bend radius of a conduit. ● Find the maximum capacitor kvar for a motor and the current reduction obtained. ● Find the motor current, heater current, breaker required, wire size, starter and conduit size for a particular 3 phase motor. ● Find the full load current of an induction, squirrel cage, and synchronous motor. ● Find the locked rotor current of a single or 3 phase motor. ● Estimate the Maximum Pull Tension. ● Calculate voltage, current and kVA of single and three phase transformers. ● Do basic ohm’s law calculations. ● Find decimal equivalents of fractions. ● Convert temperature scales. ● Look up connector configurations. ● Look up NEC tables 315.60(C)(1-20) Tested with iOS 16.6 thru iOS 26.3 Please note that this is a calculator for codes used in the NEC and CEC. It is not a replacement for the code books.
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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
Supabase
React Navigation
date-fns
react-native-paper
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.
