# Z21 mobile

> iOS app for controlling Z21 Digital Center model train systems. (iPhone/iPad app by Modelleisenbahn GmbH.)

- Source: https://appshunter.io/ios/app/z21-mobile/id533805539 (this page in markdown: same URL + `.md`)
- Developer: [Modelleisenbahn GmbH](https://appshunter.io/developer/533805542)
- Category: Lifestyle, Entertainment
- Price: Free
- Rating: 4.40/5 from 5 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.1.6 · 27 MB
- Languages: American English, Czech, French (France), German (Germany), Japanese, Chinese (Simplified, China)
- Released: 2012-06-30
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/z21-mobile/id533805539/reviews.md

## What is Z21 mobile?

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-Mobile-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.

## Key features

- Connect to Z21 Digital Center
- Manage locomotive libraries
- Control locomotives (DCC/Motorola)
- Program digital components
- Intuitive graphic interface
- Locomotive function control

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/z21-mobile/id533805539/reviews.md

### 3/5 — No copy Loco1 to loco2

*2019-01-26*

Cannot copy locks etc must create from scratch. No library of USA Loco types. Clumbsy.   

Still trying figure out how to export import.

### 3/5 — Great app but can't create routes on iPhone 6

*2015-11-24, version 2.3.7*

The app works well with the Z21 but it has an issue when creating routes on an iPhone 6 with iOS 9.1. I can create a new route but when I try to rename it, the app crashes. If I then try to create another route without renaming the first one, the first route gets overwritten with the new empty route. I have tried reinstalling the app but it didn't solve the issue.

Please solve this issue to make this app 5 stars.

### 5/5 — Great and reliable system

*2015-08-09, version 2.3.3*

Well worth the money; would be nice to have some new features such as train automation though.

### 5/5 — 还不错

*2014-06-10*

希望紧急停止键更大一些

## Frequently asked questions about Z21 mobile

### What is Z21 mobile?

Z21 mobile is an iOS application that allows users to connect to a Z21 Digital Center to control their model train layouts and locomotives. It offers features like locomotive library management, programming digital components, and direct control of trains.

### Is Z21 mobile free to download?

Yes, Z21 mobile is available for free download. The app does not have any in-app purchases or advertisements, making it a completely free experience for users.

### What devices support Z21 mobile?

Z21 mobile is designed for iOS devices, specifically supporting iPhones and iPods. It was last updated on March 21, 2018, with version 2.3.20.

### Can I try Z21 mobile without a Z21 Digital Center?

Yes, Z21 mobile includes a demo mode that allows you to explore its features and functionality without needing to connect to a physical Z21 Digital Center. This is a great way to see if the app meets your needs.

### How does Z21 mobile control locomotives?

Z21 mobile allows for intuitive control of locomotives using touch technology. You can manage locomotive functions, adjust speed by dragging your finger on the speed indicator, and activate lights or sounds with simple taps.

### What is the age rating for Z21 mobile?

Z21 mobile has an age rating of 4+. This indicates it is suitable for children aged four and older, with no mature content present in the application.

### How often is Z21 mobile updated?

The latest version of Z21 mobile, 2.3.20, was released on March 21, 2018. While the app has not been updated recently, it remains functional for its intended purpose.

### Does Z21 mobile have ads?

No, Z21 mobile does not contain advertisements. The app is completely free and ad-free, providing an uninterrupted experience for model train enthusiasts.

## Version history (last 5 releases)

### 2.3.20 — 2018-03-21

This app has been updated by Apple to display the Apple Watch app icon.

- Bugfix for repeated export via share

### 2.3.19 — 2018-02-19

- Added export function so you can easily copy layouts to the new Z21 app

### 2.3.17 — 2017-10-06

- Bug fix: crash open the camera

### 2.3.15 — 2017-09-14

- Export railway layouts with iOS 11

### 2.3.14 — 2017-07-11

- Bug fix: Display information of occupancy detector module on device

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| --- | --- | --- | --- |
| [@Home for Homematic](https://appshunter.io/ios/app/home-for-homematic/id1452818008) | — | Free | Lifestyle |
| [Win-Digipet Mobile](https://appshunter.io/ios/app/win-digipet-mobile/id404427672) | 5.0 (1) | Free | Lifestyle |
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| [Loco Revue](https://appshunter.io/ios/app/loco-revue/id848911117) | — | Free | Lifestyle |
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## More apps by Modelleisenbahn GmbH

- [Z21 mobile HD](https://appshunter.io/ios/app/z21-mobile-hd/id535465008)
- [Roco NEXT Generation](https://appshunter.io/ios/app/roco-next-generation/id913873900)
- [Z21](https://appshunter.io/ios/app/z21/id1114706450)
- [Z21Updater](https://appshunter.io/ios/app/z21updater/id1463533460)
- [RocoAR](https://appshunter.io/ios/app/rocoar/id1529108412)

All apps by Modelleisenbahn GmbH: https://appshunter.io/developer/533805542

## Related topics

[z21 mobile](https://appshunter.io/ios/topics/z21-mobile) · [z21](https://appshunter.io/ios/topics/z21)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*