# 分贝测试仪 vs 鉴机

The clearest difference is price: 分贝测试仪 at Free against 鉴机's $3.99. 鉴机's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

分贝测试仪 is free to download; 鉴机 costs $3.99 up front. 分贝测试仪 sells 1 in-app purchase, starting at $3.99 per month. 鉴机 asks for nothing beyond the download.

## The numbers

| Metric | 分贝测试仪 | 鉴机 |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 4 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [卫豪 吴](https://appshunter.io/developer/1770299422) | [登阳 李](https://appshunter.io/developer/6772393523) |

## What reviewers say

### 分贝测试仪

[App page](https://appshunter.io/ios/app/id6756571551)

This app transforms your smartphone into a precise noise meter to measure environmental sound levels. It offers real-time detection, multiple display modes, and professional reports for evidence and decision-making.

**Highlights:** Real-time decibel measurement, A, B, Z weighting modes, Waveform, spectrum, and dial displays, Professional monitoring reports, Historical data logging, Video recording (subscription)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe to Professional Edition | $3.99 | per month |


### 鉴机

[App page](https://appshunter.io/ios/app/id6778002145)

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

**In-app purchases:** none


## Frequently asked questions

### Is 分贝测试仪 free?

分贝测试仪 is free to download, with in-app purchases available.

### Is 鉴机 free?

鉴机 costs $3.99, with no in-app purchases.

### Do 分贝测试仪 or 鉴机 have ads?

Neither 分贝测试仪 nor 鉴机 shows ads.

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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.*