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.
Connect directly to an MRC Prodigy WiFi module.
Connect directly to a Digitrax LnWi module.
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 4.24 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.

- Select road or yard throttle control arrangements
- Dual throttle screen
- F0 - F28 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)

What’s New

Version 3.4.1

Fixed Track Power setting sometimes missing switch.

Ratings and Reviews

4.6 out of 5
19 Ratings

19 Ratings

Ornithusiast ,

Great App but does not work with my phone

I have this app running on some older iphones and it works just great. I love the interface. I have absolutely no complaint about this in that respect. This app is my favorite way to run trains. In fact I have sold some of my Digitrax throttles because this is such a great app.

But, my iPhone XR running latest iOS will not connect to the server (I am using Digitrax LNWI). It can’t find the LNWI no matter what (even putting in the IP address). If that could get fixed I would be a real happy camper!

FrankReviewer ,

Wonderful App

This is the best $10 app I have purchased. This app works seamlessly with JMRI and made my transition to DCC a joy. For anyone interested in the model railroad hobby this is a top notch app because it is intuitive, flexible and works with on most iPad and iPhones. Save time and energy by investing in this first before purchasing more expensive radio stations for wireless control. Beware you will need to invest in some hardware before using this product. It is not a stand-alone app. Do a little homework to maximize the enjoyment.

trainnut9999 ,

Great app!

This app works extremely well with my digitrax module. Response is immediate and is easier for me to use vice my dt400. I actually prefer my phone as a controller. I am able to control switches as easily as with a digitrax throttle.
UI graphics are inconsequential to the operation of the functions and provide excellent responses. Keep the improvements coming.

App Privacy

The developer, Beth Hoffman, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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