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
Piping and Flange Handbook
THE MOST DETAILED AND USER FRIENDLY IPHONE PIPE FITTER APP JUST KEEPS GETTING BETTER!!
$8.99 · In-app purchases
PRICE
$8.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
2 ratings · Top 50%
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Piping and Flange Handbook: 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
Provide comprehensive details and images for each type.
Assumption to check: Limited specifications available for some flanges and pipes.
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced filtering and search features.
Assumption to check: Poor search functionality leading to user frustration.
Validate with people who use this workflow before building.
Hypothesis 3
Standardize UI components and improve overall design.
Assumption to check: Inconsistent UI/UX across different screens.
Validate with people who use this workflow before building.
Hypothesis 4
Ensure timely updates and responsive customer support.
Assumption to check: Lack of regular updates and support.
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
THE MOST DETAILED AND USER FRIENDLY IPHONE PIPE FITTER APP JUST KEEPS GETTING BETTER!! Ever been in the field, shop, meeting, or away from the office and needed some quick data on pipes, flanges, and fittings? Wouldn't it be nice to have all this information in your pocket? The time has finally come!! The ORIGINAL and #1 selling Pipe Fitters Handbook is designed for Pipe Fitters, Piping Designers, Engineers, Students, or anyone who needs data on pipe and piping components quickly at their finger tips. Every component has been drawn in CAD and dimensions checked for accuracy by a professional engineer. The BEST and MOST DETAILED mobile Piping Component Reference Guide keeps getting better and better with new components frequently added and some surprises coming soon! COMPONENTS: Fittings: Long & Short-Radius Elbows, Straight & Reducing Tees, Caps, Concentric & Eccentric Reducers Flanges: Welding Neck, Socket Welding, Slip-On Welding, Threaded & Blind (150 to 2500 ANSI for RF and RTJ flange faces) Pipe Schedules: STD, XS, XXS & all Schedules (stainless steel and carbon steel materials) Socketwelded and Threaded Components The following sections and components will be delivered soon: - Branch Connections - Valves - Spectacle and Paddle Blinds FEATURES: ** INTUITIVE and EASY to use interface ** ALL drawings dimensionally correct and generated by CAD software ** METRIC & IMPERIAL units ** BROWSE and SEARCH piping by size and schedule. Data includes dimensional information and weight ** BROWSE all common flange types such as RFWN, Socket Welded, Slip-on, Threaded, Lap joint ** QUICKLY determine the number and size of studs required for all flange types and sizes ** Great companion to our Pipe and Flange Calculator App Feedback: [email protected]
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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
axios
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.
