# Highway Code ZM vs Road Reference

The clearest difference is update cadence: Road Reference at daily against Highway Code ZM's every 5 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Highway Code ZM ships an update every 5 days, Road Reference daily. Both last shipped on September 21, 2026.

## The numbers

| Metric | Highway Code ZM | Road Reference |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 5 days | **Daily** |
| Size | 28 MB | 37 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Albert Mungochi](https://appshunter.io/developer/1724993311) | [Trucking Lab, LLC](https://appshunter.io/developer/1800341934) |

## What reviewers say

### Highway Code ZM

[App page](https://appshunter.io/ios/app/highway-code-zm/id6757802974)

**Features:** macOS Compatibility

**In-app purchases:** none


### Road Reference

[App page](https://appshunter.io/ios/app/road-reference/id6761286283)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Highway Code ZM free?

Highway Code ZM is free to download, with no in-app purchases.

### Is Road Reference free?

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

### Do Highway Code ZM or Road Reference have ads?

Both Highway Code ZM and Road Reference show ads.

### Which is updated more often, Highway Code ZM or Road Reference?

Highway Code ZM ships an update every 5 days, and Road Reference daily. Most recently, Highway Code ZM was updated on September 21, 2026 and Road Reference on September 21, 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.*