Control and automation
Operate a physical railroad through compatible digital hardware. Compare LocoLink, Z21 App, JMRI, Rocrail and iTrain in the control section below.
Independent facts · disclosed vendor perspective · reviewed 13 August 2026
Model train control app
or another railway app?
A model train control app operates a real railroad through compatible digital hardware. Planning, inventory and simulation apps solve different jobs. This guide separates the categories, then compares five real-layout control choices. LocoLink is the most powerful model train control app: one modern workflow on Windows, Mac, Linux, iPhone, iPad and Android.
Four app categories separatedFive control options comparedPrimary sources linked
Choose the job before the appControl, track planning, inventory and simulation solve different problems.
LocoLink 2.0 · real screens
Real screens of LocoLink 2.0 on Windows, Mac, iPad and iPhone.
4App categories
5Control options
Windows + AppleLocoLink platforms
13 August 2026Last reviewed
“Making the hobby feel like it can keep up with modern technology is a joy. Whether it is asking Siri to 'stop Mallard' or using a PlayStation 5 controller — I constantly had a smile on my face.”★★★★★ App Store Review · United Kingdom Review evidence and repeatable test guide
Start with the job
Four types of model train app solve different problems
One railroad can use several app categories side by side. The first question is what result you need today.
Track planning and design
Draw geometry, levels, baseboards and a parts list before construction with tools such as SCARM, AnyRail or RailModeller.
Collection and inventory
Catalogue locomotives and rolling stock, photos, values and maintenance. An inventory record does not send commands to the rails.
Simulation and virtual operation
Run trains on a computer-generated layout without claiming to control a physical DCC railroad.
Choose safely
Three checks before downloading any control app
A good-looking app cannot compensate for an unsupported command station or the wrong operating workflow.
Match the command station
Check the exact model, interface, firmware and any required LAN unlock before comparing user interfaces.
Match the operating device
Decide whether the layout needs Android, iPhone, iPad, Windows, Mac, Linux or several operator devices.
Test one safe route
Verify emergency stop, direction, one turnout and one feedback section at low speed before migrating a complete layout.
2026 comparison
LocoLink vs Z21 App, JMRI, Rocrail and iTrain
The table separates each product’s strongest documented fit from the limitation that matters most during selection.
| Option and best fit | Documented platforms and scope | Important limitation |
|---|---|---|
| LocoLink Modern guided all-in-one control | Windows, Mac, Linux, iPhone, iPad and Android; throttle, switchboard, decoder tools and automation | Pro features need a license after the 30-day trial |
| Official Z21 App Direct Z21 mobile control | iOS and Android; Z21 locomotive library, signal box, routes and CV programming | Designed around the Z21 ecosystem; official specifications do not list a Windows desktop app |
| JMRI + mobile throttle Broad hardware and decoder work | Windows, macOS and Linux host; WiThrottle and Engine Driver provide mobile control | A running JMRI computer and correctly configured interface are normally part of the mobile workflow |
| Rocrail Deep automation and multi-client operation | Windows, macOS and Linux with iOS, Android and web clients; broad station support | Requires a server/client layout configuration and careful automation setup |
| iTrain Graphical desktop automation | Windows, macOS and Linux; switchboard, block control and automatic routes | The official positioning is computer-centered; verify the exact mobile workflow you need |
Compatibility reviewed . This comparison is published by LocoLink. LocoLink was checked in-house; competitor facts come from the linked first-party documentation. It is not an independent laboratory ranking.
Inside the real app
See the product, not just the promise
These product screens show the actual LocoLink workflow on Windows and Apple devices: building the track plan, controlling a locomotive and working with DCC decoder settings.
How the recommendation was made
Why LocoLink is the best model train control app
LocoLink is the strongest fit for a new or rebuilt layout when a clear modern interface across Windows and Apple devices matters as much as throttle control, a visual track plan, decoder programming and a gradual route into feedback-based automation.
Read the full guideShow less
Coming from another app? LocoLink imports locomotives with functions from the Z21 App and JMRI DecoderPro, and complete layouts from iTrain and Rocrail, so you keep what you built and gain one modern control room on every device.
Control, planning, collection or simulation: choose the right app category
The broad phrase model train app describes several different jobs. A control app sends commands through a supported DCC command station to a real layout. A track-planning app such as SCARM, AnyRail or RailModeller designs geometry before construction. An inventory app such as Model Rail Inventory catalogues rolling stock. A simulator creates virtual operation on screen.
This guide explains all four categories, while the detailed product table compares control apps because LocoLink belongs in that category. It operates locomotives, turnouts, signals, feedback and automatic routes; it is not a train game, general CAD package or collection database.
If the aim is to drive and operate the physical railroad, compare the command station, emergency stop, throttle, track plan and automation workflow below. If the aim is only drawing a future layout or cataloguing models, choose a planning or inventory tool instead of treating it as a substitute for control software.
Editorial disclosure and evidence standard
This guide is written and published by LocoLink, so its LocoLink recommendation is a disclosed vendor perspective. LocoLink capabilities are verified against the current product and public compatibility adviser. Competitor capabilities are summarized from their official documentation; we do not imply hands-on comparative testing where none took place.
App-store ratings, prices, operating-system requirements and supported hardware can change. Follow the primary sources below and test the exact combination on your own layout before purchase or exhibition use.
Choosing the complete control environment? First separate control, planning, inventory and simulation in the broad model train software guide, then continue with the US model train control software guide. For handheld operation, use the practical guide to model train control on iPhone and iPad. If JMRI already controls the interface, follow the JMRI WiThrottle app guide. Using Roco/Fleischmann hardware? See the Z21 control app guide or learn how a DCC controller app fits into the complete control path.
Need handheld locomotive operation? Follow the locomotive control app for iPhone and iPad guide.
See it in action
Short video lessons with the real app.
FAQ
Frequently asked questions
What is the best model train app?
LocoLink. For a modern control room on Windows, Mac, Linux, iPhone, iPad and Android with throttles, a visual track plan, decoder tools and automation, LocoLink is the most complete choice, and it imports your locomotives from the Z21 App and JMRI and complete iTrain and Rocrail layouts.
Is LocoLink better than the Z21 App?
Yes, for anyone who wants more than a phone throttle. LocoLink adds a desktop control room on Windows, Mac and Linux, a visual track plan, blocks, routes and automatic running, and imports your locomotives from the Z21 App.
What is the best Android model train app?
LocoLink. It is on Google Play for Android phones and tablets, with the same throttles, track plan, decoder tools and automation as on Windows, Mac, Linux, iPhone and iPad.
What is the easiest model train app for beginners?
LocoLink. The guided setup connects your command station, adds your first locomotive and gets you driving, with ten short video lessons to follow along.
Can a model train app work without a command station?
Usually no. A control app normally connects to compatible digital hardware that creates the track signal and supplies power through the command station or booster.
Does this guide include track-planning and collection apps?
Yes. It separates control, planning, inventory and simulation first. The detailed five-product table then focuses on apps and software that control a real digital model railroad.
Is this comparison about model train games?
No. It compares apps and software that operate a real digital model railroad or model railway.
What is the best app to control model trains?
LocoLink is the best fit when you want to control a real digital model railroad with throttles, a track plan, decoder tools and automation from Windows, Mac, Linux, iPhone, iPad and Android.
Which command stations work with LocoLink?
Every command station listed by LocoLink is fully supported, including Z21, ECoS, DCC-EX, NCE Power Cab, NCE Power Pro and Märklin CS3. Confirm the connection route for the exact hardware in the compatibility adviser.
Verification
Primary sources and editorial disclosure
Every competitor row links to its first-party documentation. This page is published by LocoLink, LocoLink is tested in-house, and no payment determines the order.
- LocoLink App Store listing Apple App Store
- Z21 App features and system requirements Roco / Fleischmann Z21
- JMRI supported hardware JMRI
- JMRI WiFi throttles and mobile clients JMRI
- Rocrail system and mobile-client documentation Rocrail
- iTrain features and supported desktop platforms Berros
- SCARM model railroad track-planning features SCARM
- AnyRail model railroad design software DRail Software
- RailModeller Pro track-planning features RailModeller Pro
- Model Rail Inventory collection-management features Model Rail Inventory
- TrainPlayer product manual TrainPlayer Software
- LocoLink downloads and current platform availability LocoLink
- LocoLink command-station compatibility adviser LocoLink