# Qr reader vs Decibel：db Sound Meter

The clearest difference is update cadence: Qr reader at every 2 days against Decibel：db Sound Meter's every 9 months. Decibel：db Sound Meter's advantage is review sentiment (8% vs 0%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Qr reader sells 3 in-app purchases, starting at $3.99 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 reader ships an update every 2 days, Decibel：db Sound Meter every 9 months. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Qr reader | Decibel：db Sound Meter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **8.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 44 MB | 27 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | 9+ |
| Developer | [树帆 张](https://appshunter.io/developer/1759009115) | [Qinghe Net LLC](https://appshunter.io/developer/1780821316) |

## What reviewers say

### Qr reader

[App page](https://appshunter.io/ios/app/qr-reader-qr-code/id6698872988)

Easily generate custom-colored QR codes for various content types like links and emails. Scan existing QR codes from your album or camera. Offers a free trial and subscription options for advanced features.

**Highlights:** Generate QR codes for links, email, social media, Scan QR codes from camera or album, Customize QR code colors and backgrounds, Supports various content types, Automatic renewal subscription service

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Continuous package week | $3.99 | per 7 days |
| Monthly Membership | $5.99 | one-time |
| Annual Membership | $14.99 | one-time |


### 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 reader free?

Qr reader 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 reader or Decibel：db Sound Meter have ads?

Neither Qr reader nor Decibel：db Sound Meter shows ads.

### Which is updated more often, Qr reader or Decibel：db Sound Meter?

Qr reader ships an update every 2 days, and Decibel：db Sound Meter every 9 months. Most recently, Qr reader was updated on September 23, 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.*