# Decibel dB vs QR Code Reader. Scanner App

The clearest difference is monetization model: QR Code Reader. Scanner App at free with in-app purchases against Decibel dB's subscription. QR Code Reader. Scanner App also leads on update cadence (daily vs every 4 months). Decibel dB's advantage is ratings volume (676 vs 9) and rating (4.7 vs 4.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Decibel dB sells 6 in-app purchases, starting at $3.99 per 7 days and QR Code Reader. Scanner App sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Decibel dB holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Decibel dB has 676 ratings behind it against 9, so its average is the more settled of the two.

Decibel dB ships an update every 4 months, QR Code Reader. Scanner App daily. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Decibel dB | QR Code Reader. Scanner App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (676 ratings)](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1644852399/reviews)** | [4.4 (9 ratings)](https://appshunter.io/ios/app/qr-code-reader-scanner-app/id6670252056/reviews) |
| Number of ratings | **676** | 9 |
| Positive reviews | 77.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Daily** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 32 MB | 23 MB |
| Requires iOS | **12.4** | 17.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ITincubator UAB](https://appshunter.io/developer/1617775851) | [Marvin Wimmer](https://appshunter.io/developer/1771470022) |

## What reviewers say

### Decibel dB

[App page](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1644852399)

Measure ambient noise and sound levels in real-time with this tool. It helps control noise pollution and protect user health by displaying decibel values numerically and graphically. Track exposure over time with NIOSH and OSHA compliant measurements.

**Highlights:** Measure noise in decibels (dB), Track MIN, AVG, MAX sound levels, Record and export measurements, Overlay noise levels on photos/videos, NIOSH and OSHA compliant meter

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound Level Meter Pro | $3.99 | per 7 days |
| Weekly Access | $3.99 | per 7 days |
| Decibel Meter: Pro Version | $6.99 | per month |
| Monthly Access | $6.99 | per month |
| Noise Level Meter (dB) Pro | $12.99 | per year |
| Yearly Access | $12.99 | per year |

**What reviewers like**

- 👍 Accurate and reliable measurements
- 🚀 Easy to use interface
- 💡 Innovative features like photo/video noise overlay
- 👍 Compliant with industry standards
- 👍 Detailed noise tracking and monitoring

**What reviewers complain about**

- 🐛 Inconsistent accuracy compared to other apps
- 🐛 Doesn't detect loud noises accurately

**Reported bugs**

- Inaccurate decibel readings in some environments
- Occasional crashes or freezes

**Requested features**

- Ability to record and export noise measurements
- Integration with smart home devices


### QR Code Reader. Scanner App

[App page](https://appshunter.io/ios/app/qr-code-reader-scanner-app/id6670252056)

This utility app quickly and easily scans QR codes and barcodes, automatically performing actions based on the scanned content. It offers a user-friendly interface, scan history, and advanced customization options for everyday use.

**Highlights:** Fastest QR and barcode scanning, Automatic action performance, Scan history log, Advanced settings and customization, Supports various code types

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QRCodeReaderWeeklyTrial | $6.99 | per 7 days |
| QRCodeReaderWeeklyWithoutTrial | $6.99 | per 7 days |


## Frequently asked questions

### Is Decibel dB free?

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

### Is QR Code Reader. Scanner App free?

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

### Which has better reviews, Decibel dB or QR Code Reader. Scanner App?

Decibel dB is rated higher. Decibel dB averages 4.7 out of 5 from 676 ratings, while QR Code Reader. Scanner App averages 4.4 from 9 ratings.

### Do Decibel dB or QR Code Reader. Scanner App have ads?

Neither Decibel dB nor QR Code Reader. Scanner App shows ads.

### Which is updated more often, Decibel dB or QR Code Reader. Scanner App?

Decibel dB ships an update every 4 months, and QR Code Reader. Scanner App daily. Most recently, Decibel dB was updated on October 15, 2026 and QR Code Reader. Scanner App on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*