# Decibel X PRO vs SmarterNoise Pro

The clearest difference is review sentiment: Decibel X PRO at 74% against SmarterNoise Pro's 29%. Decibel X PRO also leads on in-app purchases (none vs 4) and ratings volume (6.9K vs 31). SmarterNoise Pro's advantage is price (Free vs $69.99) and update cadence (monthly vs every 3 months). On ads and device support there is nothing between them.

SmarterNoise Pro is free to download; Decibel X PRO costs $69.99 up front. SmarterNoise Pro sells 4 one-off in-app purchases. Decibel X PRO asks for nothing beyond the download.

Decibel X PRO holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Decibel X PRO has 6.9K ratings behind it against 31, so its average is the more settled of the two. Written reviews point the same way: 74% of Decibel X PRO's written reviews are positive against 29% of SmarterNoise Pro's.

Decibel X PRO ships an update every 3 months, SmarterNoise Pro monthly. The most recent releases landed on September 22, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Decibel X PRO | SmarterNoise Pro |
| --- | --- | --- |
| Price | $69.99 | **Free** |
| Rating | **[4.7 (6.9K ratings)](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611/reviews)** | [4.4 (31 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews) |
| Number of ratings | **6.9K** | 31 |
| Positive reviews | **74.2% of reviews** | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 24 MB | 24 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [SkyPaw Co., Limited](https://appshunter.io/developer/1842040687) | [Johan Rogard](https://appshunter.io/developer/1384299041) |

## What reviewers say

### Decibel X PRO

[App page](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611)

This application transforms your device into a professional sound level meter, offering precise dBA and dBC measurements. It features advanced analysis tools like frequency spectrum analysis and data export, making it ideal for audio professionals and anyone interested in sound environments.

**Highlights:** Professional sound level meter, dBA and dBC measurements, Frequency spectrum analysis (FFT, BAR graphs), Data logging and export (PNG, CSV), Apple Watch support, Health App integration, Dosimeter with NIOSH, OSHA standards

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Works well
- 🚀 Keeps getting better with updates
- 💡 Useful for monitoring noise levels
- 💡 Helps protect hearing
- 👍 Accurate measurements

**What reviewers complain about**

- 🐛 Data transfer issues between devices
- 🐛 Crashes and stability issues
- 🐛 Camera crashes
- 🐛 Bugs with dark mode and language settings
- 🐛 Inconsistent readings compared to other apps

**Reported bugs**

- Crashes on launch after recent update
- Inability to open app on iPhone 6S and newer devices
- Incorrect or unreadable data display on iPad

**Requested features**

- Add video recording with live dB overlay
- Improve readability of frequency scale
- Include dBC measurements
- Add alarm for exceeding noise thresholds
- Provide more detailed documentation and support


### 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 |


## Frequently asked questions

### Is Decibel X PRO free?

Decibel X PRO costs $69.99, with no in-app purchases.

### Is SmarterNoise Pro free?

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

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

Decibel X PRO is rated higher. Decibel X PRO averages 4.7 out of 5 from 6.9K ratings, while SmarterNoise Pro averages 4.4 from 31 ratings.

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

Neither Decibel X PRO nor SmarterNoise Pro shows ads.

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

Decibel X PRO ships an update every 3 months, and SmarterNoise Pro monthly. Most recently, Decibel X PRO was updated on September 22, 2026 and SmarterNoise Pro on September 7, 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.*