App Overview

IAP Bushings & Tubes Reference icon

IAP Bushings & Tubes Reference

penturners.org LLC · Reference

The IAP Bushings & Tubes app provides a searchable and sortable interface to over 4000 pen kits from most of the major kit suppliers

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.5
17 ratings · Top 15%

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/
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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.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for IAP Bushings & Tubes Reference: 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

Provide more comprehensive details and user reviews.

Assumption to check: Limited item details and descriptions

Validate with people who use this workflow before building.

Hypothesis 2

Implement offline caching for item data.

Assumption to check: Lack of offline access

Validate with people who use this workflow before building.

Hypothesis 3

Enable sharing of items via social media or messaging.

Assumption to check: No sharing options

Validate with people who use this workflow before building.

Hypothesis 4

Add advanced filtering and sorting features for better item discovery.

Assumption to check: Limited filtering options

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 IAP Bushings & Tubes app provides a searchable and sortable interface to over 4000 pen kits from most of the major kit suppliers. The app displays detailed tube and bushing specifications and drill bit requirements for every kit in the app database. These kit details can be emailed or printed via Air Print. You can create a favorites list of your most frequently used kits for faster access to those kits rather than searching through the entire app database every time you need to reference those kits. You can also reorder the database by your preferred supplier order. A User Notes feature allows you to enter personal notes about any kit in the database. No limits are imposed on the size of your notes and they can contain punctuation characters, line feed characters, and new line characters. Your notes will be included when you print or email kit information. You can also print, export, or share individual notes or generate and share a CSV file containing all your notes. The app also includes a drill bit converter for converting between inch fractional, inch decimal, metric and gauge drill sizes. Conversions to inch fractional are made to the nearest 1/64" and conversions to gauge drill size are made to the nearest gauge drill size (107-1 and A-Z). An error factor is displayed for inexact conversions to inch fractional and gauge drill size. A 30-digit, 4-function calculator is included in the app. It has several advanced features not found in many simple calculators including a memory cell and the ability to display data in decimal or scientific notation. Photos, Instructions and Bushing Drawings are available for most of the kits. When instructions or bushings are available, they may be viewed, mailed or printed. The app also contains several lists of useful references: Worldwide Suppliers of pen kits with links to take you directly to their web site; Helpful Penturning videos with links that will take you directly to the video; and Penturning Tutorials with links that will download the tutorial to your device for viewing in the app or to email or print. The app will automatically download database updates and the kit reference files from the IAP server.

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.

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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.