# Win vs Z21 mobile HD

The clearest difference is in-app purchases: Win at none against Z21 mobile HD's 3. Win also leads on review sentiment (86% vs 57%) and device support (3 vs 1). Z21 mobile HD's advantage is update cadence (monthly vs every 18 months) and ratings volume (3 vs 1). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. Z21 mobile HD sells 3 one-off in-app purchases. Win asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Win against 5.0 for Z21 mobile HD. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 86% of Win's written reviews are positive against 57% of Z21 mobile HD's.

Win ships an update every 18 months, Z21 mobile HD monthly. Both last shipped on November 1, 2026.

## The numbers

| Metric | Win | Z21 mobile HD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/win-digipet-mobile/id404427672/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/z21-mobile-hd/id535465008/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | **85.7% of reviews** | 57.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Free | Free |
| Size | 4 MB | 46 MB |
| Requires iOS | 15.6 | **5.1.1** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Markus Herzog](https://appshunter.io/developer/404427675) | [Modelleisenbahn GmbH](https://appshunter.io/developer/533805542) |

## What reviewers say

### Win

[App page](https://appshunter.io/ios/app/win-digipet-mobile/id404427672)

Control your model train setup remotely from your iPhone or iPad. Manage locomotives, switches, routes, and more with this companion app for Win-Digipet Premium Edition.

**Highlights:** Locomotive control, Function decoder control, Track layout management, Switching routes and tours, Solenoid device control, Emergency off state control

**Features:** macOS Compatibility

**In-app purchases:** none


### Z21 mobile HD

[App page](https://appshunter.io/ios/app/z21-mobile-hd/id535465008)

Control your model train layout and locomotives directly from your iOS device. Manage your locomotive library, program digital components, and operate trains with intuitive touch controls. A demo mode is available for exploration.

**Highlights:** Connect to Z21 Digital Center, Manage locomotive libraries, Control locomotives with DCC/Motorola decoders, Program digital components, Intuitive graphic interface, Assign custom locomotive images

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BR52 | $10.99 | one-time |
| RH 109.13 | $10.99 | one-time |
| BR103 | $10.99 | one-time |


## Frequently asked questions

### Is Win free?

Win is free to download, with no in-app purchases.

### Is Z21 mobile HD free?

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

### Which has better reviews, Win or Z21 mobile HD?

Win and Z21 mobile HD are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Win or Z21 mobile HD have ads?

Neither Win nor Z21 mobile HD shows ads.

### Which is updated more often, Win or Z21 mobile HD?

Win ships an update every 18 months, and Z21 mobile HD monthly. Most recently, Win was updated on November 1, 2026 and Z21 mobile HD on November 1, 2026.

---

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