# Hearing test instruments vs 顺时通书

The clearest difference is price: Hearing test instruments at Free against 顺时通书's $0.99. Hearing test instruments also leads on iOS requirement (12.1 vs 16.0). 顺时通书's advantage is update cadence (every 9 days vs every 5 weeks). On ads, in-app purchases and device support there is nothing between them.

Hearing test instruments is free to download; 顺时通书 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hearing test instruments ships an update every 5 weeks, 顺时通书 every 9 days. The most recent releases landed on September 15, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Hearing test instruments | 顺时通书 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Size | 48 MB | 14 MB |
| Requires iOS | **12.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cemho Medical Technology (Guangdong) Co., Ltd](https://appshunter.io/developer/1643075084) | [志涛 刘](https://appshunter.io/developer/1886716876) |

## What reviewers say

### Hearing test instruments

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 顺时通书

[App page](https://appshunter.io/ios/app/id6761001829)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hearing test instruments free?

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

### Is 顺时通书 free?

顺时通书 costs $0.99, with no in-app purchases.

### Do Hearing test instruments or 顺时通书 have ads?

Neither Hearing test instruments nor 顺时通书 shows ads.

### Which is updated more often, Hearing test instruments or 顺时通书?

Hearing test instruments ships an update every 5 weeks, and 顺时通书 every 9 days. Most recently, Hearing test instruments was updated on September 15, 2026 and 顺时通书 on September 23, 2026.

---

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