# Exactly vs Z21 mobile HD

The clearest difference is rating: Z21 mobile HD at 5.0 against Exactly's 2.2. Z21 mobile HD also leads on review sentiment (57% vs 26%) and update cadence (monthly vs every 5 months). Exactly's advantage is in-app purchases (none vs 3) and ratings volume (14 vs 3). On price, ads and device support there is nothing between them.

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

Z21 mobile HD holds the better App Store score, 5.0 against 2.2. Both are backed by a comparable volume of ratings — 14 and 3 respectively. Written reviews point the same way: 26% of Exactly's written reviews are positive against 57% of Z21 mobile HD's.

Exactly ships an update every 5 months, Z21 mobile HD monthly. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Exactly | Z21 mobile HD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (14 ratings)](https://appshunter.io/ios/app/exactly/id315268140/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/z21-mobile-hd/id535465008/reviews)** |
| Number of ratings | **14** | 3 |
| Positive reviews | 26.0% of reviews | **57.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Freemium | **Free** |
| Size | 3 MB | 46 MB |
| Requires iOS | 16.6 | **5.1.1** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 12+ | 4+ |
| Developer | [Exact Editions Ltd](https://appshunter.io/developer/315268143) | [Modelleisenbahn GmbH](https://appshunter.io/developer/533805542) |

## What reviewers say

### Exactly

[App page](https://appshunter.io/ios/app/exactly/id315268140)

Access magazines and newspapers on your iPad and iPhone in their original full-color format. Enjoy interactive features like live web links and zoom capabilities. Explore free content from numerous publications or use your subscription for the latest issues.

**Highlights:** Full-color digital editions, Live web links, Zoom and swipe navigation, Thumbnail page view, Bookmark pages, Offline reading sync

**Features:** Vision Pro support

**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 Exactly free?

Exactly 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, Exactly or Z21 mobile HD?

Z21 mobile HD is rated higher. Exactly averages 2.2 out of 5 from 14 ratings, while Z21 mobile HD averages 5.0 from 3 ratings.

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

Neither Exactly nor Z21 mobile HD shows ads.

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

Exactly ships an update every 5 months, and Z21 mobile HD monthly. Most recently, Exactly was updated on November 6, 2026 and Z21 mobile HD on November 1, 2026.

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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.*