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)
WiThrottle is a strong, affordable wireless throttle for iOS that delivers reliable multi-loco control, ease of use, and broad hardware compatibility, particularly with JMRI. Users praise its ability to control several locomotives at once on an iPad and its roster feature for labeling. It’s supported by responsive help and offers solid value. However, reviewers note stability issues when the app runs in the background and occasional hardware-control bugs (turnouts, DCC-EX) that can disrupt operation. UI polish is sometimes cited, but the core functionality remains compelling.
Pros
Ability to control multiple locomotives at once (up to 4 on iPad, 2 on iPhone), making layouts easier to operate.
Easy-to-use, intuitive interface that’s quick to learn.
Strong hardware compatibility and responsive performance with JMRI, Sprog, Digitrax LNWI, NCE, and MRC.
Roster feature for naming locomotives and customizing function labels for quick access.
Good value for money as a low-cost wireless throttle option with solid capabilities.
Cons
Connection and control stability issues when the app runs in the background or the device sleeps, causing trains to drop the connection and require re‑connecting.
Occasional hardware-control bugs (e.g., turnout control problems and DCC-EX horn-stuck issues) that can interrupt operation.
Recent reviews
This app works great on the iPad. You can control four throttles at one time. On the iPhone I can only control two at a time. It’s a great app.
byDF*****, 2026-02-13
The interface is reminiscent of my first Fischer Price toy dash board filled with buttons and knobs that all did nothing. Basic but important features such as a power button failed to work. Purchased the full version of the app for the power on/off feature alone only to feel fleeced out of my hard earned $10. Unfortunately this app is underdeveloped with promised but basic features not working at all. Adding insult to injury I was refused any refund after several requests. "Fooled me once" is the worst business model, good luck.