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.
Piping Base Elbow Layout Calculator is a iPhone app that provides the fitter with the points to make an accurate cut (fish mouth, cope, etc) for piping (base pipe cylinder to elbow radius) intersections
$4.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Piping Base Elbow Layout Calc: 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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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
Assumption to check: Limited input validation for calculations.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of user guidance or help section.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No customization options for users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Single payment model may deter users.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Piping Base Elbow Layout Calculator is a iPhone app that provides the fitter with the points to make an accurate cut (fish mouth, cope, etc) for piping (base pipe cylinder to elbow radius) intersections. This app is intended to be used by fitters, welders, fabricators, or anyone who needs to join a metal cylinder at an elbow. Are you still carrying that blue book around? Confused about how to layout cut lines for joining a piece of pipe to an elbow? If you are a pipe fabricator, welder, or fitter who needs to make perfect elbow base support cuts, then this app is for you. Forget books, calculators, compasses, ancient saddle layout procedures, laptops, expensive CAD programs, mathematics or internet access to figure out how to make that perfect base ell joint. Piping Base Elbow Layout Calculator is easy. Piping Base Elbow Layout Calculator provides the offset layout dimensions for that perfect pipe joint. This calculator works with any size pipe, any size elbow of any radius, and any wall thickness of pipe. User enters: main pipe outside diameter, base support diameter, wall thickness (this app considers wall thickness, you don't want to leave too much metal, or take too much off) and elbow or bend radius. The calculator does the rest. The calculator will provide dimensions for three different configurations: CENTER (base support), TOP (dummy leg), or BOTTOM (dummy leg). This calculator immediately produces an ordinate table of the offsets. The beauty of this app is that it also produces full size pattern templates, so you don't have to measure and layout all of the work points. Now you can print out your pipe pattern templates for any size and any angle intersection. This version outputs patterns configured for an 8.5 X 11 (everyone has access to one of these), 11 X 17, and 24 X 36 printer sizes. So with this app and a 8.5 X 11 printer, the user can still produce any size pipe coping pattern. The calculator is very versatile. Presently input and output is US based imperial and/or metric. Output is feet, or feet and inches, decimal or fractions (to 1/32"). User can control how much cut line accuracy he/she wants by setting how many control points are desired (infinite amount, user can get 8 control points, i.e. every 45 degrees or 360 control points, i.e every degree, or more). Most books only give 8 or 16 control points. This app allows an infinite amount. For example, a 2" pipe needs fewer control points than a 48".
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.