# Decibel vs 噪音检测仪

The clearest difference is update cadence: Decibel at every 4 days against 噪音检测仪's every 11 days. Decibel also leads on iOS requirement (13.4 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Decibel sells 2 in-app purchases, starting at $3.99 per 7 days and 噪音检测仪 sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Decibel ships an update every 4 days, 噪音检测仪 every 11 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Decibel | 噪音检测仪 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 11 days |
| Size | 16 MB | 20 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [浩翔 吕](https://appshunter.io/developer/1723604551) | [艇 徐](https://appshunter.io/developer/1720872299) |

## What reviewers say

### Decibel

[App page](https://appshunter.io/ios/app/decibel-pro-noise-detection/id6480333932)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly membership | $3.99 | per 7 days |
| Annual membership | $12.99 | per year |


### 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 free?

Decibel is free to download, with in-app purchases available.

### Is 噪音检测仪 free?

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

### Do Decibel or 噪音检测仪 have ads?

Neither Decibel nor 噪音检测仪 shows ads.

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

Decibel ships an update every 4 days, and 噪音检测仪 every 11 days. Most recently, Decibel was updated on October 30, 2026 and 噪音检测仪 on November 5, 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.*