# Decibel Detector vs 噪音检测仪

The clearest difference is in-app purchases: Decibel Detector at none against 噪音检测仪's 2. 噪音检测仪's advantage is update cadence (every 11 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 噪音检测仪 sells 2 in-app purchases, starting at $3.99 per 7 days. Decibel Detector asks for nothing beyond the download.

Decibel Detector ships an update every 5 months, 噪音检测仪 every 11 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Decibel Detector | 噪音检测仪 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-detector/id6745181319/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 33 MB | 20 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [北京泰燊信息技术有限公司](https://appshunter.io/developer/1784907008) | [艇 徐](https://appshunter.io/developer/1720872299) |

## What reviewers say

### Decibel Detector

[App page](https://appshunter.io/ios/app/decibel-detector/id6745181319)

This app provides real-time environmental noise monitoring and data tracking. It offers smart alerts for custom noise thresholds and generates professional PDF reports. Adaptable to various scenarios, it helps users understand acoustic data and identify sound sources.

**Highlights:** Real-time decibel monitoring, Historical data tracking, Customizable smart alerts, Multi-scenario adaptation, Professional PDF reporting, FFT spectrum analysis, Environmental noise classification

**Features:** macOS Compatibility

**In-app purchases:** none


### 噪音检测仪

[App page](https://appshunter.io/ios/app/ai/id6748600963)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $3.99 | per 7 days |
| 年会员 | $12.99 | per year |


## Frequently asked questions

### Is Decibel Detector free?

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

### Is 噪音检测仪 free?

噪音检测仪 is free to download, with in-app purchases available.

### Do Decibel Detector or 噪音检测仪 have ads?

Neither Decibel Detector nor 噪音检测仪 shows ads.

### Which is updated more often, Decibel Detector or 噪音检测仪?

Decibel Detector ships an update every 5 months, and 噪音检测仪 every 11 days. Most recently, Decibel Detector was updated on October 12, 2026 and 噪音检测仪 on October 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.*