App Overview

WiThrottle icon

WiThrottle

Beth Hoffman · Utilities

Use your iPhone, iPod touch, or iPad as a throttle for model railroad control!

$9.99 · In-app purchases

PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.2
40 ratings · Top 30%

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

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Rork plan preview for WiThrottle: map the core Utilities 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 settings for users to fine-tune their throttle experience.

Assumption to check: Limited customization options for advanced users

Validate with people who use this workflow before building.

Hypothesis 2

Implement better error handling and reconnection strategies.

Assumption to check: Occasional connectivity issues with Wi-Fi

Validate with people who use this workflow before building.

Hypothesis 3

Include guided tutorials and tooltips to enhance onboarding.

Assumption to check: Steep learning curve for new users

Validate with people who use this workflow before building.

Hypothesis 4

Integrate haptic feedback and visual indicators for control adjustments.

Assumption to check: Lack of real-time feedback on controls

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

Use your iPhone, iPod touch, or iPad as a throttle for model railroad control! **PLEASE NOTE** This App is not a stand-alone product! Other hardware and software are required. Link to the popular JMRI software through a local Wi-Fi network to access throttle, address, and function controls wirelessly. -or- Connect directly to an MRC Prodigy WiFi module. -or- Connect directly to a Digitrax LnWi module. -or- Connect directly to a WifiTrax WFD-30/31. Digital Command Control (DCC) is now the most common control method for earnest model railroaders, allowing multiple trains to be controlled simultaneously anywhere on the track. JMRI is an interface program that works with most brands of DCC and is very popular because it simplifies DCC programming, signaling, control, and many other aspects of running a permanent layout. It is also free and multi-platform. Instead of direct control through the DCC system, WiThrottle links with JMRI or a dedicated module. This provides a universal interface to many possible combinations of technology and model railroads. As DCC evolves, JMRI is updated as needed to match current technology. JMRI Requirements: - JMRI 2.12 or higher, JMRI 5.2 or newer recommended - DCC system interfaced to a computer and a model railroad - Local Wi-Fi network MRC Prodigy WiFi Requirements: - MRC Prodigy WiFi module - MRC Prodigy DCC system Digitrax LnWi Requirements: - Digitrax LnWi module - Digitrax DCC system WifiTrax WFD-30/31 Requirements: - WifiTrax WFD module - NCE DCC system If you operate at either a club or private home that uses JMRI for operations and has Wi-Fi, access to the local network (host may need to share their password) is all you need. Multiple iPhone, iPod touch, and iPad mobile devices may use their own WiThrottle app simultaneously during an operating session. If you would like to sample WiThrottle, we offer a Lite version at no charge. This allows you to confirm compatibility before buying the full App. Please visit our website for additional information. Our goal is to enhance your model railroading experience by providing convenient, wireless control of your existing system. WiThrottle is the final piece of the puzzle. Features: - Select road or yard throttle control arrangements - Dual throttle screen - F0 - F68 function controls - Build and break Advanced Consists - Link multiple addresses for control by one throttle (Universal Consists) - Control JMRI routes & turnouts - Imports roster list and function labels from your JMRI files - Access the JMRI WebServer for control panels and more - Adjust sensitivity of the throttle slider - Set for right or left hand use - Acquire and dispatch addresses wirelessly - Train idles if interrupted (e.g. phone call) - Control track power - Fastclock display - Automatic networking - Flashlight for devices equipped with camera flash WiThrottle will integrate seamlessly if: - you can already control a train using the built-in throttles of JMRI 2.12 or later - your iPhone, iPod touch, or iPad can access your local wireless network (not cellular or Bluetooth)

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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.

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BUILD KIT DIFFICULTY
Advanced

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.