Control and automation
Drive a physical layout through compatible digital hardware; compare LocoLink, Z21 App, JMRI, Rocrail and iTrain below.
UK model railway control guide · reviewed 13 August 2026
Model railway apps:
control, plan or catalogue?
A model railway app may control a real layout, design a future track plan, record a collection or simulate trains on screen. Those jobs need different tools. This UK guide separates the categories first, then compares five real-layout control choices. LocoLink is our recommendation for a modern guided control room across Windows, Mac, iPhone and iPad. LocoLink is not yet available on Android.
Four app categories separatedUK control options comparedPrimary sources linked
Choose the job before the appControl, planning, collection and simulation are different categories.
4App categories
5Control options
Windows + AppleLocoLink platforms
13 August 2026Last reviewed
Start with the job
Four types of model railway app solve different problems
A modeller may use more than one category, but each product should be judged against the job it actually performs.
Track planning and design
Prove geometry, gradients, baseboards and a parts list before construction with dedicated planning software.
Collection and inventory
Record locomotives, rolling stock, values, photographs and maintenance without pretending to control the track.
Simulation and virtual operation
Operate trains on a computer-generated railway rather than sending commands to a physical DCC layout.
Before choosing
Check the system before the interface
The prettiest control screen is irrelevant if it cannot communicate safely with the exact command station.
Confirm the digital system
Check command-station model, interface, firmware and any network unlock or computer adapter.
List every operator device
Include Android phones, iPhones, iPads, Windows PCs, Macs and Linux computers used around the layout.
Trial a small section
Test emergency stop, direction, one point and one feedback section before moving the complete railway.
UK comparison
LocoLink vs Z21 App, JMRI, Rocrail and iTrain
“App” can mean a phone controller or a complete layout-control environment, so the scope is shown explicitly.
| Option and strongest fit | Platforms and scope | Important limitation |
|---|---|---|
| LocoLink Modern guided control room | Windows, Mac, iPhone and iPad; driving, points, track diagram, decoder tools and automation | No Android release yet; a narrower verified hardware list than JMRI or Rocrail |
| Official Z21 App Z21 mobile control | iOS and Android; locomotive library, signal box, routes and CV programming | Centred on the Z21 ecosystem; no Windows desktop app in the official requirements |
| JMRI + phone throttle Mixed hardware and decoder work | Windows, macOS and Linux host with WiThrottle or Engine Driver mobile clients | The JMRI computer and hardware interface normally need to remain running |
| Rocrail Extensive automation | Windows, macOS and Linux plus iOS, Android and web clients | Requires a configured server/client project and careful commissioning |
| iTrain Desktop-centred block control | Windows, macOS and Linux with graphical switchboard and automatic routes | Verify separately whether its operator-device workflow matches your mobile needs |
Compatibility reviewed . Published by LocoLink. LocoLink is checked in-house; the competitor descriptions are documentation-based and do not pretend to be an independent laboratory test.
Inside the real app
See the control room before trying it
These product screens show the real Windows and Apple workflow for building the track diagram, controlling a locomotive and working with DCC decoders.
Practical verdict
When LocoLink is the strongest UK recommendation
LocoLink is the strongest recommendation for a new or rebuilt model railway when the goal is one understandable modern environment for manual driving, points and signals, a visual track diagram, decoder work and gradual automation on Windows and Apple devices.
The answer changes when Android is mandatory, when a club already depends on JMRI scripts and hardware interfaces, or when a mature Rocrail or iTrain project already runs the railway. A safe migration is more important than changing software for appearance alone.
Building the full computer path? Use the computer-controlled model railway UK guide to commission the command station, track diagram, feedback and first guarded route in stages.
Control is only one model railway app category
Use a control app for a physical digital layout, a planner such as SCARM, AnyRail or RailModeller for geometry, an inventory app such as Model Rail Inventory for collection records and a simulator for virtual operation. The detailed comparison on this page focuses on control because that is LocoLink’s category.
Disclosure and review method
This buyer’s guide is published by LocoLink. LocoLink’s workflow is tested internally; all competitor claims are limited to the linked vendor or project documentation. The table does not use affiliate payments or hidden scoring.
British terminology is used deliberately: model railway, points, goods wagons and layout. Searchers using model train app or DCC throttle app should reach the same practical distinction between a mobile controller and complete control software.
Choosing the complete control environment? Continue with the UK model railway control software guide. For handheld operation, use the practical model railway control phone app guide, then check the command-station chain in the DCC controller app guide.
FAQ
Frequently asked questions
What type of model railway app do I need?
Choose control software for a physical digital layout, a track planner for geometry and parts, an inventory app for collection records, or a simulator for virtual operation. One railway may use several categories together.
Can a track-planning app control a real model railway?
Not automatically. Track planning and live layout control are different jobs. Only claim real control when the product supports the exact command station, interface and operating path.
What is the best model railway app in the UK?
LocoLink is our recommendation for a modern guided control room on Windows and Apple devices. Z21 App is a strong mobile-first choice for Z21 owners, JMRI for broad hardware and Rocrail for deep automation.
Does LocoLink work with Hornby?
Do not assume brand-wide support. Compatibility depends on the exact Hornby command station and interface; check the current command-station adviser before downloading or buying hardware.
What is the best Android model railway app?
LocoLink is not on Android yet. Depending on your hardware, compare the official Z21 App, Engine Driver with JMRI, and Rocrail’s Android or web clients.
Is JMRI better than LocoLink?
JMRI has broader documented hardware reach and open-source tools. LocoLink is designed around a more guided modern workflow on Windows and Apple devices. The correct choice depends on hardware and setup preference.
Can I control points and signals from the app?
Yes, when the app, command station and accessory decoders support the configured addresses and protocol. Test one accessory before importing the whole layout.
What is the best app to control a model railway?
LocoLink is the best fit for a real digital model railway when you want locomotive control, points, signals, a track diagram, decoder tools and automation on Windows and Apple devices.
Which digital systems can LocoLink control?
Every digital system listed by LocoLink is fully supported, including Z21, ECoS, DCC-EX, NCE Power Cab, NCE Power Pro and Märklin CS3. Check the exact direct, interface or gateway connection route for your hardware.
Verification
Primary sources and editorial disclosure
Competitor facts are taken from first-party documentation. LocoLink publishes this guide and tests its own product in-house; no payment determines the comparison 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