# QR Scanner vs Decibel：db Sound Meter

The clearest difference is ads: Decibel：db Sound Meter at none against QR Scanner's shown. Decibel：db Sound Meter also leads on review sentiment (8% vs 0%). QR Scanner's advantage is update cadence (every 11 days vs every 9 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. QR Scanner sells 10 in-app purchases, starting at $0.99 per 7 days and Decibel：db Sound Meter sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

QR Scanner ships an update every 11 days, Decibel：db Sound Meter every 9 months. The most recent releases landed on September 21, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | QR Scanner | Decibel：db Sound Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (8 ratings)](https://appshunter.io/ios/app/qr-scanner-reader-generator/id6736992829/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | **8.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 11 days** | Every 9 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 37 MB | 27 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [SWAPP YAZILIM LIMITED SIRKETI](https://appshunter.io/developer/1774262293) | [Qinghe Net LLC](https://appshunter.io/developer/1780821316) |

## What reviewers say

### QR Scanner

[App page](https://appshunter.io/ios/app/qr-scanner-reader-generator/id6736992829)

This utility app allows you to scan and generate QR codes and barcodes. It also converts images to PDFs and enables digital document signing, streamlining various daily tasks for both personal and professional use.

**Highlights:** QR code and barcode scanning, QR code and barcode creation, Image to PDF conversion, Digital document signing, User-friendly interface

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Qr Scanner - Weekly | $0.99 | per 7 days |
| Qr Scanner - Monthly | $2.99 | per month |
| Qr Scanner - Weekly | $3.99 | per 7 days |
| Qr Scanner - Weekly | $5.99 | per 7 days |
| Qr Scanner - Weekly | $7.99 | per 7 days |
| Qr Scanner - Weekly | $9.99 | per 7 days |
| Qr Scanner - Monthly | $14.99 | per month |
| Qr Scanner - Monthly | $17.99 | per month |
| Qr Scanner - Monthly | $19.99 | per month |
| Qr Scanner - Monthly | $24.99 | per month |


### Decibel：db Sound Meter

[App page](https://appshunter.io/ios/app/decibeldb-sound-meter/id6740468843)

Measure noise levels accurately with this practical tool. It offers real-time decibel monitoring, photo and video recording with decibel watermarks, and downloadable reports for easy noise management.

**Highlights:** Real-time decibel monitoring, Photo recording with decibel watermark, Real-time video recording, Downloadable monitoring reports, Detailed decibel detection records

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Members | $3.99 | per 7 days |
| Monthly Membership | $5.99 | per month |
| Annual Membership | $14.99 | per year |


## Frequently asked questions

### Is QR Scanner free?

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

### Is Decibel：db Sound Meter free?

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

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

QR Scanner shows ads; Decibel：db Sound Meter does not.

### Which is updated more often, QR Scanner or Decibel：db Sound Meter?

QR Scanner ships an update every 11 days, and Decibel：db Sound Meter every 9 months. Most recently, QR Scanner was updated on September 21, 2026 and Decibel：db Sound Meter on September 26, 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.*