# Decibel dB vs QR Code. Scanner & Reader.

The clearest difference is review sentiment: Decibel dB at 77% against QR Code. Scanner & Reader.'s 0%. Decibel dB also leads on rating (4.7 vs 4.2) and ratings volume (685 vs 19). QR Code. Scanner & Reader.'s advantage is monetization model (free with in-app purchases vs subscription) and update cadence (every 4 days vs every 4 months). 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 & Reader. sells 1 in-app purchase, 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 4.2. That said, the two scores are not equally well evidenced: Decibel dB has 685 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 77% of Decibel dB's written reviews are positive against 0% of QR Code. Scanner & Reader.'s.

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

## The numbers

| Metric | Decibel dB | QR Code. Scanner & Reader. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (685 ratings)](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1644852399/reviews)** | [4.2 (19 ratings)](https://appshunter.io/ios/app/qr-code-scanner-and-reader/id6599855497/reviews) |
| Number of ratings | **685** | 19 |
| Positive reviews | **77.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 32 MB | 39 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ITincubator UAB](https://appshunter.io/developer/1617775851) | [Halil Ak](https://appshunter.io/developer/1756962251) |

## 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 & Reader.

[App page](https://appshunter.io/ios/app/qr-code-scanner-and-reader/id6599855497)

Easily scan QR codes and barcodes to access information like menus, product details, and online resources. Create custom codes for sharing or promotion. Includes a fun QR code-based game and a history log.

**Highlights:** Scan QR codes and barcodes, Generate custom QR codes, Instant menu access, Product price and nutrition info, Smart shopping price comparison, Scan history log, QR code Tic-Tac-Toe game

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Premium Access to QR app | $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. Scanner & Reader. free?

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

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

Decibel dB is rated higher. Decibel dB averages 4.7 out of 5 from 685 ratings, while QR Code. Scanner & Reader. averages 4.2 from 19 ratings.

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

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

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

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