# Decibel Meter vs Decibel Meter Master

The clearest difference is in-app purchases: Decibel Meter Master at none against Decibel Meter's 9. Decibel Meter Master also leads on ads (none vs shown) and rating (4.6 vs 4.3). Decibel Meter's advantage is update cadence (every 2 weeks vs every 6 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. Decibel Meter sells 8 in-app purchases, starting at $1.99 per 7 days. Decibel Meter Master asks for nothing beyond the download.

Decibel Meter Master holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 907 and 3.2K respectively. Written reviews complicate that: 57% of Decibel Meter's written reviews are positive against 52% of Decibel Meter Master's, so the app with the better star average is not the one people write more warmly about.

Decibel Meter ships an update every 2 weeks, Decibel Meter Master every 6 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Decibel Meter | Decibel Meter Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (907 ratings)](https://appshunter.io/ios/app/decibel-meter-measure-db-level/id1274038012/reviews) | **[4.6 (3.2K ratings)](https://appshunter.io/ios/app/decibel-meter-master/id1281344281/reviews)** |
| Number of ratings | 907 | **3.2K** |
| Positive reviews | **56.8% of reviews** | 51.9% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 107 MB | 25 MB |
| Requires iOS | 13 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [文波 曾](https://appshunter.io/developer/1557199654) | [燕辉 冯](https://appshunter.io/developer/1264665476) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-measure-db-level/id1274038012)

Transform your phone into a professional-grade decibel meter for real-time noise detection. Features advanced algorithms, noise visualization, and recording capabilities for comprehensive sound analysis.

**Highlights:** Military-grade algorithm, Professional GB weighted detection, Noise recording, Noise classification system, AI ambient noise visualization, Noise dosimeter

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free trail then subscribe | $1.99 | per 7 days |
| 分贝测试仪专业版 | $2.99 | per 3 months |
| 分贝仪专业版 | $2.99 | per 7 days |
| 分贝测试仪专业版 | $4.49 | per 6 months |
| Pro Monthly Subscription | $5.49 | per month |
| 分贝测试仪专业版 | $25.99 | per year |
| Remove advertisement | $0.99 | one-time |
| 终身尊享权益 | $29.99 | one-time |

**What reviewers like**

- 👍 Accurate decibel measurements
- 🚀 Easy to use
- 💡 Useful for various applications (e.g. restaurants, heating systems)
- 🚀 Free version works great

**What reviewers complain about**

- 🐛 Inaccurate readings at higher decibel levels
- 🔒 Requires location access for no apparent reason
- 🔒 Excessive ads and subscription model
- 🐛 Compatibility issues (e.g. no iPad support, Chinese EULA)

**Reported bugs**

- Decibel readings capped at 90 dB
- Displaying incorrect address information
- Crashing or freezing on launch
- Showing 70 dB in a completely silent room

**Requested features**

- Landscape mode for iPad
- Ability to detect sounds above 90 dB
- Option to disable ads or switch to a paid version


### Decibel Meter Master

[App page](https://appshunter.io/ios/app/decibel-meter-master/id1281344281)

This tool transforms your iPhone into a professional sound level meter. It accurately measures ambient noise levels, providing real-time decibel readings directly on your device.

**Highlights:** Measures sound level, Acts as a decibel meter, Uses iPhone as a meter, Measures noise level

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Simple and easy to use
- 👍 Useful for measuring sound levels
- 🆓 Free app

**What reviewers complain about**

- 🐛 Inaccurate readings
- 🔍 Questionable security with clipboard access
- 🔧 Doesn't work consistently

**Reported bugs**

- Spelling mistakes in the app
- Inconsistent behavior across devices

**Requested features**

- Add calibration option
- Ability to save and review measurements
- Frequency profile display


## Frequently asked questions

### Is Decibel Meter free?

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

### Is Decibel Meter Master free?

Decibel Meter Master is free to download, with no in-app purchases.

### Which has better reviews, Decibel Meter or Decibel Meter Master?

Decibel Meter Master is rated higher. Decibel Meter averages 4.3 out of 5 from 907 ratings, while Decibel Meter Master averages 4.6 from 3.2K ratings.

### Do Decibel Meter or Decibel Meter Master have ads?

Decibel Meter shows ads; Decibel Meter Master does not.

### Which is updated more often, Decibel Meter or Decibel Meter Master?

Decibel Meter ships an update every 2 weeks, and Decibel Meter Master every 6 months. Most recently, Decibel Meter was updated on November 6, 2026 and Decibel Meter Master on November 6, 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.*