# Z vs Hearing test instruments

The clearest difference is iOS requirement: Hearing test instruments at 12.1 against Z's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Z ships an update every 3 weeks, Hearing test instruments every 5 weeks. Both last shipped on September 15, 2026.

## The numbers

| Metric | Z | Hearing test instruments |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 34 MB | 48 MB |
| Requires iOS | 15.0 | **12.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [文 周](https://appshunter.io/developer/1690564319) | [Cemho Medical Technology (Guangdong) Co., Ltd](https://appshunter.io/developer/1643075084) |

## What reviewers say

### Z

[App page](https://appshunter.io/ios/app/z-hearing/id6449798347)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hearing test instruments

[App page](https://appshunter.io/ios/app/hearing-test-instruments/id6736933056)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z free?

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

### Is Hearing test instruments free?

Hearing test instruments is free to download, with no in-app purchases.

### Do Z or Hearing test instruments have ads?

Neither Z nor Hearing test instruments shows ads.

### Which is updated more often, Z or Hearing test instruments?

Z ships an update every 3 weeks, and Hearing test instruments every 5 weeks. Most recently, Z was updated on September 15, 2026 and Hearing test instruments on September 15, 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.*