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
Rigger Ref
Rigger Ref is a reference and calculation utility for riggers
$19.99 · In-app purchases
PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 included17 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 Rigger Ref: 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
Expand the range of tools offered and provide unique features.
Assumption to check: Limited tool selection compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a free trial or freemium model to attract more users.
Assumption to check: High initial cost for users
Validate with people who use this workflow before building.
Hypothesis 3
Focus on simplifying the interface and enhancing user experience.
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate a community forum or Q&A section for user engagement.
Assumption to check: Lack of community or support features
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
Rigger Ref is a reference and calculation utility for riggers. Keep specifications of ropes, hardware, slings, and material densities at your finger tips. Quickly figure safe working loads, line sag, amount of line on a drum, and bridle calculations. Calculation features: -Figure Catenary curves based on line tension, weight, line weight, and tower heights. -Figure amount of Line on a Drum using Drum Calc -Estimate weights based on volume and materials using Load Calc -Figure sling tension, and angles for different bridles -US and Metric units / on the fly conversion Reference Features: -Common Rope Specifications -Common Hardware Specifications -Common Sling Specifications -Search Specifications and Comments -Automatically figure Safe Working Loads Customization Features: -Add your own Ropes or Hardware -Set your own Safety Factors for figuring Safe Working Loads -Track which ropes and hardware you've got on hand. -Create manifests of frequently used equipment to automatically total weights or costs. -Track when a manifest or equipment exceeds or falls short of a weight budget. -Mail manifests of equipment or labor quickly. -Easily import manifests onto other devices running Rigger Ref.
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
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.
