Contains adsIn-app purchases
700 reviews
Content rating
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About this app

Use this app to connect to a Z21 Digital Center. A demo mode is available.
With this app you can manage locomotive libraries, locomotives and locomotive functions, program digital components – and of course control all locomotives with DCC- or Motorola-decoder, as easy and convenient as is only possible with touch-technology.
The digital switchboard Z21 connects your model train unit and your digital locomotives with your iOS device via WLAN. This way you can control the operation on your train layout easily and conveniently from your mobile device.

Model train control was never this easy and convenient: With one swipe of your hand you can scroll to your model of choice in the locomotive library. A slight touch on the headlight symbol and the front and backlights go on. A second touch, this time on the speaker symbol, and the locomotive makes a sound. Drag your finger over the speed indicator and the train accelerates.

The further highlights of the Z21-App
• Control your entire layout with an intuitive, graphic interface and have easy access to the entire scope of functions of your digital locomotives.
• Manage your entire locomotive-library in just one application, including individual locomotive images for an ideal overview.
• Control the digital functions of your locomotives with intuitive function symbols instead of complicated key combinations.
• Create a blueprint of your railway system and control your switches, signals and modules with a single click.
• Download driver cabs and control your locomotives from a real train driver’s point of view.
Updated on
May 6, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data is encrypted in transit
Committed to follow the Play Families Policy

Ratings and reviews

500 reviews
A Google user
October 23, 2018
I would like to have info stats on the steering screen, like used amps and voltages on current locomotive and the old 3 colored throttle scala was much nicer, also there is no option to test the functions during a manual setup. I like that you can disable the loco swipe, cuz it was a nightmare in the old app, throttle response sensitivity can be changed, that's neat too. Overall a decent app.
4 people found this review helpful
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A Google user
October 30, 2019
In the old app I had added locos some of which I didn't have a picture for and some that I did. I imported the data into the new app, 1.2.2, and it decided all by itself that all of the locos should have a picture. It assigned a picture to the locos that previously didn't have a picture in the old app in a completely random way. Sometimes it added a picture of a Roco loco and sometimes it used a picture from one of my added locos. At no point was I connected to a Z21. When I went to edit a loco, by tapping on the pencil, the app swapped the pictures round on the locos in the list. I tapped onto the loco I wanted to remove a picture from but when the loco screen was shown no picture was visible, not even a silhouette. In the steering screen it is now difficult to ensure that I have correctly picked the right loco to run because more than one loco has the same picture. I would rather not delete a loco that has the wrong picture and then recreate it from scratch. If I could simply delete loco pictures, I cannot find a way to do this, that would helpful but I'd rather the software didn't mess around in the first place.
8 people found this review helpful
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Mark Yeo