# Decibel Meter Sound Level dB vs QR Code Scanner | Reader

The clearest difference is in-app purchases: QR Code Scanner | Reader at none against Decibel Meter Sound Level dB's 4. QR Code Scanner | Reader also leads on ads (none vs shown) and iOS requirement (9.0 vs 16.6). On price and device support there is nothing between them.

Both are free to download. Decibel Meter Sound Level dB sells 4 in-app purchases, starting at $4.99 per 7 days. QR Code Scanner | Reader asks for nothing beyond the download.

## The numbers

| Metric | Decibel Meter Sound Level dB | QR Code Scanner | Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (24 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-level-db/id1609178369/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 65 MB |
| Requires iOS | 16.6 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [汇杭 钟](https://appshunter.io/developer/1481585840) | [Anouar Kabbouri](https://appshunter.io/developer/1616722902) |

## What reviewers say

### Decibel Meter Sound Level dB

[App page](https://appshunter.io/ios/app/decibel-meter-sound-level-db/id1609178369)

This tool transforms your iPhone into a professional sound level meter. It measures noise levels, tracks daily noise exposure, and can record video with embedded decibel data for evidence. Analyze sound frequencies and generate reports for workplace compliance or noise complaints.

**Highlights:** Professional noise dosimeter, OSHA & NIOSH standards compliance, Video recording with dB overlay, Spectrum analyzer (RTA), PDF report export, Calibration for accuracy, Background measurement mode

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly | $5.99 | per month |
| Premium Yearly | $29.99 | per year |
| Lifetime Premium | $49.99 | one-time |


### QR Code Scanner | Reader

[App page](https://appshunter.io/ios/app/qr-code-scanner-reader/id1620070273)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter Sound Level dB free?

Decibel Meter Sound Level dB is free to download, with in-app purchases available.

### Is QR Code Scanner | Reader free?

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

### Do Decibel Meter Sound Level dB or QR Code Scanner | Reader have ads?

Decibel Meter Sound Level dB shows ads; QR Code Scanner | Reader does not.

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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.*