# Z21 vs Faller Car System Digital

The clearest difference is in-app purchases: Faller Car System Digital at none against Z21's 1. Z21's advantage is iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Z21 sells 1 one-off in-app purchase. Faller Car System Digital asks for nothing beyond the download.

## The numbers

| Metric | Z21 | Faller Car System Digital |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (13 ratings)](https://appshunter.io/ios/app/z21/id1114706450/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 38.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 232 MB | 72 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Modelleisenbahn GmbH](https://appshunter.io/developer/533805542) | [Gebr. Faller GmbH Fabrik fur Qualitatsspielwaren](https://appshunter.io/developer/1667221251) |

## What reviewers say

### Z21

[App page](https://appshunter.io/ios/app/z21/id1114706450)

Control your model train layout and locomotives wirelessly from your iOS device. Manage your locomotive library, program digital components, and operate switches and signals with an intuitive touch interface. Enjoy a realistic train control experience with customizable driver cabs.

**Highlights:** Wireless control of locomotives and layout, Manage locomotive library with images, Program digital components, Intuitive graphic interface for switches and signals, Downloadable driver cabs for realistic control, Demo mode available

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Z21 Full Version | $17.99 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 🚀 Fast and reliable locomotive control
- 💡 Innovative layout design with schematic control station
- 🎨 Clean, modern orange and black design
- 📱 Works seamlessly across multiple iOS devices

**What reviewers complain about**

- 🐛 Frequent app crashes and freezes
- 🔌 Connection drops to Z21 control station
- ⚠️ White screen startup issues in recent updates
- 🎮 Throttle display bugs showing incorrect speeds
- 📉 Slow performance on older devices

**Reported bugs**

- App crashes on startup (white screen issue)
- Connection drops to Z21 central station
- Throttle display shows incorrect or blank speeds
- Function buttons not responding properly in multitraction mode
- Route synchronization failures across multiple control station pages

**Requested features**

- Offline locomotive database access
- Dark mode or customizable color schemes
- Background image support for layout design
- Turntable/rotary module support
- Automatic event-based control (occupancy detection, crossing automation)


### Faller Car System Digital

[App page](https://appshunter.io/ios/app/faller-car-system-digital/id6742844305)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z21 free?

Z21 is free to download, with in-app purchases available.

### Is Faller Car System Digital free?

Faller Car System Digital is free to download, with no in-app purchases.

### Do Z21 or Faller Car System Digital have ads?

Neither Z21 nor Faller Car System Digital shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*