# Decibel Meter vs Q R Code Reader Scan ™

The clearest difference is review sentiment: Q R Code Reader Scan ™ at 100% against Decibel Meter's 25%. Q R Code Reader Scan ™ also leads on rating (4.7 vs 4.4). Decibel Meter's advantage is ads (none vs shown) and update cadence (weekly vs every 9 months). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Decibel Meter sells 5 in-app purchases, starting at $6.99 per month and Q R Code Reader Scan ™ sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Q R Code Reader Scan ™ holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 36 and 57 respectively. Written reviews point the same way: 25% of Decibel Meter's written reviews are positive against 100% of Q R Code Reader Scan ™'s.

Decibel Meter ships an update weekly, Q R Code Reader Scan ™ every 9 months. The most recent releases landed on August 27, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Decibel Meter | Q R Code Reader Scan ™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (36 ratings)](https://appshunter.io/ios/app/decibel-meter-db-sound-levels/id6738940890/reviews) | **[4.7 (57 ratings)](https://appshunter.io/ios/app/q-r-code-reader-scan/id6746056428/reviews)** |
| Number of ratings | 36 | **57** |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 9 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 16 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Depict, Incorporated](https://appshunter.io/developer/1583344827) | [Kartika Ardiani](https://appshunter.io/developer/1777769813) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-db-sound-levels/id6738940890)

Transform your smartphone into a professional sound measurement tool. Accurately measure real-time sound intensity with multiple weighting modes and track historical data. Ideal for professionals and enthusiasts monitoring noise levels.

**Highlights:** Real-time decibel readings, Accurate +/- 1 dB precision, A-weighted and C-weighted modes, Graphing and historical tracking, Background logging, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibels Plus | $6.99 | per month |
| Decibels Plus | $6.99 | per month |
| Decibels Plus | $44.99 | per year |
| Decibels Plus | $44.99 | per year |
| Decibels Plus - Lifetime | $199.99 | one-time |


### Q R Code Reader Scan ™

[App page](https://appshunter.io/ios/app/q-r-code-reader-scan/id6746056428)

Instantly read QR codes and barcodes from your camera or saved photos. Offers smart actions like opening websites, calling numbers, or adding contacts. All scans are automatically saved for easy access.

**Highlights:** Scan from camera or gallery, Instant QR/barcode detection, Smart actions for scanned data, Automatic scan history, Easy sharing of results, Clean and simple interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QR Code Reader Pro - 1W | $1.99 | per 7 days |
| QR Code Reader Pro - 1M | $3.99 | per month |
| QR Code Reader Pro - 1Y | $19.99 | per year |
| QR Code Reader Pro | $39.99 | one-time |


## Frequently asked questions

### Is Decibel Meter free?

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

### Is Q R Code Reader Scan ™ free?

Q R Code Reader Scan ™ is free to download, with in-app purchases available.

### Which has better reviews, Decibel Meter or Q R Code Reader Scan ™?

Q R Code Reader Scan ™ is rated higher. Decibel Meter averages 4.4 out of 5 from 36 ratings, while Q R Code Reader Scan ™ averages 4.7 from 57 ratings.

### Do Decibel Meter or Q R Code Reader Scan ™ have ads?

Q R Code Reader Scan ™ shows ads; Decibel Meter does not.

### Which is updated more often, Decibel Meter or Q R Code Reader Scan ™?

Decibel Meter ships an update weekly, and Q R Code Reader Scan ™ every 9 months. Most recently, Decibel Meter was updated on August 27, 2026 and Q R Code Reader Scan ™ on September 9, 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.*