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
ResDemand
ResDemand is your on-the-go NEC-compliant residential load calculation tool
$14.99 · In-app purchases
PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
2 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/
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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 ResDemand: 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
Implement loading indicators and success messages.
Assumption to check: Limited user feedback during actions
Validate with people who use this workflow before building.
Hypothesis 2
Add onboarding tutorials and tooltips.
Assumption to check: Difficult to navigate for new users
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize dashboard and resource views.
Assumption to check: Lack of customization options
Validate with people who use this workflow before building.
Hypothesis 4
Enable API integrations with popular business tools.
Assumption to check: Limited integration with other tools
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
ResDemand is your on-the-go NEC-compliant residential load calculation tool. Designed for electricians and field technicians, this app makes it simple to calculate service demand loads accurately, using either the Standard or Optional method as defined in the National Electrical Code (NEC). Key Features: -NEC 220.42–220.82 compliant -Supports Standard & Optional load calculation methods -Add dryers, ranges, fixed appliances, HVAC, and motors -Automatically calculates largest heat or cool load (NEC 220.60) -Motor loads adjusted with proper demand factors -Voltage support for 120V/240V inputs -Summary view with full VA breakdown and minimum service size (83% rule) -Export load summary to PDF for permitting or record-keeping -Save and edit multiple project files offline with Hive-based storage -Designed for field speed: smart UI, quick data entry, responsive layout Who it's for: Licensed electricians Estimators and permit applicants Field techs verifying panel or service sizes Electrical apprentices learning the NEC Compliant. Professional. Fast. Use ResDemand to bring clarity and confidence to every residential load calc - in the field, at the desk, or at the permit counter.
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
Supabase
Victory Native
React Navigation
React Query
BUILD KIT DIFFICULTY
Intermediate
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.
