# SmarterNoise Pro vs Decibel Meter X

The clearest difference is review sentiment: Decibel Meter X at 100% against SmarterNoise Pro's 29%. Decibel Meter X also leads on in-app purchases (none vs 4) and rating (4.8 vs 4.4). SmarterNoise Pro's advantage is iOS requirement (12.0 vs 16.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. SmarterNoise Pro sells 4 one-off in-app purchases. Decibel Meter X asks for nothing beyond the download.

Decibel Meter X holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 31 and 49 respectively. Written reviews point the same way: 29% of SmarterNoise Pro's written reviews are positive against 100% of Decibel Meter X's.

SmarterNoise Pro ships an update monthly, Decibel Meter X every 4 weeks. The most recent releases landed on September 22, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | SmarterNoise Pro | Decibel Meter X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (31 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews) | **[4.8 (49 ratings)](https://appshunter.io/ios/app/decibel-meter-x/id6478142605/reviews)** |
| Number of ratings | 31 | **49** |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 6 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Johan Rogard](https://appshunter.io/developer/1384299041) | [永超 侯](https://appshunter.io/developer/906391544) |

## What reviewers say

### SmarterNoise Pro

[App page](https://appshunter.io/ios/app/smarternoise-pro/id1466745030)

This advanced sound level meter app offers detailed audio analysis with features like frequency spectrum display and data export. It allows for precise sound measurements in both video and audio recording modes, with options for A-, C-, or no weighting.

**Highlights:** Sound level measurement in video/audio modes, Frequency spectrum display, Export measurement data (CSV), Sound level activated audio recording, Calibration tool, Full HD video recording (paid)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Camera upgrade | $0.99 | one-time |
| Frequency spectrum indicator | $1.99 | one-time |
| Video and audio recording | $1.99 | one-time |
| Spectrogram display | $1.99 | one-time |


### Decibel Meter X

[App page](https://appshunter.io/ios/app/decibel-meter-x/id6478142605)

This application precisely measures sound levels and analyzes audio spectrums. It can also generate specific frequency sounds for testing, research, or therapeutic purposes. Its intuitive interface makes sound exploration accessible to all users.

**Highlights:** Precise decibel level measurement, Audio spectrum analysis, Spectrogram display, Generate specific frequency sounds, Intuitive user interface, Detailed usage instructions

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

**In-app purchases:** none


## Frequently asked questions

### Is SmarterNoise Pro free?

SmarterNoise Pro is free to download, with in-app purchases available.

### Is Decibel Meter X free?

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

### Which has better reviews, SmarterNoise Pro or Decibel Meter X?

Decibel Meter X is rated higher. SmarterNoise Pro averages 4.4 out of 5 from 31 ratings, while Decibel Meter X averages 4.8 from 49 ratings.

### Do SmarterNoise Pro or Decibel Meter X have ads?

Neither SmarterNoise Pro nor Decibel Meter X shows ads.

### Which is updated more often, SmarterNoise Pro or Decibel Meter X?

SmarterNoise Pro ships an update monthly, and Decibel Meter X every 4 weeks. Most recently, SmarterNoise Pro was updated on September 22, 2026 and Decibel Meter X on October 15, 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.*