# Decibel Meter：Sound meter vs QR Code Scanner

The clearest difference is in-app purchases: QR Code Scanner at none against Decibel Meter：Sound meter's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel Meter：Sound meter sells 3 in-app purchases, starting at $4.99 per 7 days. QR Code Scanner asks for nothing beyond the download.

## The numbers

| Metric | Decibel Meter：Sound meter | QR Code Scanner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 49 MB | 59 MB |
| Requires iOS | 15.6 | **14** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Chaoyuan Technology Co., Ltd](https://appshunter.io/developer/6777026663) | [Guangzhou Chengyun Information Technology Co., Ltd](https://appshunter.io/developer/6777938698) |

## What reviewers say

### Decibel Meter：Sound meter

[App page](https://appshunter.io/ios/app/decibel-metersound-meter/id6775763413)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly subscription | $6.99 | per month |
| annual subscription | $14.99 | per year |


### QR Code Scanner

[App page](https://appshunter.io/ios/app/qr-code-scanner-barcode/id6777910320)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter：Sound meter free?

Decibel Meter：Sound meter is free to download, with in-app purchases available.

### Is QR Code Scanner free?

QR Code Scanner is free to download, with no in-app purchases.

### Do Decibel Meter：Sound meter or QR Code Scanner have ads?

Neither Decibel Meter：Sound meter nor QR Code Scanner 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.*