# 泽其 TWS vs Hearing test instruments

The clearest difference is update cadence: Hearing test instruments at every 5 weeks against 泽其 TWS's every 7 months. Hearing test instruments also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

泽其 TWS ships an update every 7 months, Hearing test instruments every 5 weeks. The most recent releases landed on September 12, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | 泽其 TWS | Hearing test instruments |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Size | 60 MB | 48 MB |
| Requires iOS | 13.0 | **12.1** |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [泽其科技](https://appshunter.io/developer/1695687751) | [Cemho Medical Technology (Guangdong) Co., Ltd](https://appshunter.io/developer/1643075084) |

## What reviewers say

### 泽其 TWS

[App page](https://appshunter.io/ios/app/tws/id6465745595)

**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 泽其 TWS free?

泽其 TWS 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.

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

泽其 TWS ships an update every 7 months, and Hearing test instruments every 5 weeks. Most recently, 泽其 TWS was updated on September 12, 2026 and Hearing test instruments on May 17, 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.*