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
AMPFieldKit
AMPFieldKit is a professional electrical calculator and field reference tool designed for electricians, technicians, engineers, and students
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 ratings · Top 5%
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 AMPFieldKit: 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
Integrate with popular tools like Google Tasks or Asana for better workflow.
Assumption to check: Limited syncing options with other task management tools
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more streamlined project overview with collapsible sections.
Assumption to check: Cluttered interface for managing multiple projects
Validate with people who use this workflow before building.
Hypothesis 3
Add support for creating and managing recurring tasks.
Assumption to check: Lack of recurring task feature
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline task management and sync when back online.
Assumption to check: No offline access
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
AMPFieldKit is a professional electrical calculator and field reference tool designed for electricians, technicians, engineers, and students. Built for real-world use, it delivers fast, accurate calculations and essential reference data in a clean, mobile-optimized interface — no internet connection, ads, or subscriptions required. Electrical Calculators: Power Calculator (DC, Single Phase, Three Phase) Voltage Drop Calculator Ampacity Calculator Power Factor Correction Motor Full Load Current (FLC) Transformer Calculators — Fault Current, Turns Ratio, Sizing, Buck/Boost Resistance Network Calculator (Series / Parallel / Mixed) Reactance Calculator (Capacitance / Inductance) Box Fill Calculator Conductors in Conduit Calculator Reference Tools: Interactive Ohm's Law Chart Weights & Measures Quick Reference Unit Conversions Thread & Tap Drill Tables (UNC / UNF / Metric) Material Properties Table Built for the Field Designed for one-handed use in demanding environments. Every calculation runs instantly and entirely on-device — no login, no tracking, no data collection of any kind. Privacy AMP Field Reference collects no personal data. No accounts. No analytics. Nothing leaves your device.
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
Zustand
React Navigation
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.
