# Decibel dB vs QR Code Scanner

The clearest difference is monetization model: QR Code Scanner at freemium against Decibel dB's subscription. QR Code Scanner also leads on update cadence (fortnightly vs every 4 months). Decibel dB's advantage is rating (4.7 vs 4.5) and ratings volume (685 vs 41). 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 Scanner sells 4 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 4.5. That said, the two scores are not equally well evidenced: Decibel dB has 685 ratings behind it against 41, so its average is the more settled of the two.

Decibel dB ships an update every 4 months, QR Code Scanner fortnightly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Decibel dB | QR Code Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (685 ratings)](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1644852399/reviews)** | [4.5 (41 ratings)](https://appshunter.io/ios/app/qr-code-scanner-fast-reader/id6670452249/reviews) |
| Number of ratings | **685** | 41 |
| Positive reviews | 77.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Subscription | **Freemium** |
| Size | 32 MB | 11 MB |
| Requires iOS | **12.4** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ITincubator UAB](https://appshunter.io/developer/1617775851) | [Spartak Datiashvili](https://appshunter.io/developer/1780960873) |

## 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 Scanner

[App page](https://appshunter.io/ios/app/qr-code-scanner-fast-reader/id6670452249)

Instantly scan and decode various QR codes using your device's camera. Access websites, product details, Wi-Fi networks, and more with a simple, intuitive interface. Offers advanced features like history sync, custom code creation, and batch scanning through a subscription.

**Highlights:** Instant QR code scanning, Supports all QR code types, Ad-free experience (with subscription), Unlimited scans (with subscription), History and cloud sync (with subscription), Custom QR code creation (with subscription), Batch scanning (with subscription)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Weekly trial | $6.99 | per 7 days |
| Monthly | $14.99 | per month |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Decibel dB free?

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

### Is QR Code Scanner free?

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

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

Decibel dB is rated higher. Decibel dB averages 4.7 out of 5 from 685 ratings, while QR Code Scanner averages 4.5 from 41 ratings.

### Do Decibel dB or QR Code Scanner have ads?

Neither Decibel dB nor QR Code Scanner shows ads.

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

Decibel dB ships an update every 4 months, and QR Code Scanner fortnightly. Most recently, Decibel dB was updated on October 22, 2026 and QR Code Scanner on October 24, 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.*