# Decibel X PRO vs SmarterNoise

The clearest difference is price: SmarterNoise at Free against Decibel X PRO's $69.99. SmarterNoise also leads on update cadence (every 6 weeks vs every 3 months) and iOS requirement (12.0 vs 17.0). Decibel X PRO's advantage is in-app purchases (none vs 2) and ads (none vs shown). On rating, review sentiment and device support there is nothing between them.

SmarterNoise is free to download; Decibel X PRO costs $69.99 up front. SmarterNoise sells 2 one-off in-app purchases. Decibel X PRO asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Decibel X PRO against 4.6 for SmarterNoise. That said, the two scores are not equally well evidenced: Decibel X PRO has 6.9K ratings behind it against 118, so its average is the more settled of the two. Written reviews split almost evenly too, at 74% and 75% positive.

Decibel X PRO ships an update every 3 months, SmarterNoise every 6 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Decibel X PRO | SmarterNoise |
| --- | --- | --- |
| Price | $69.99 | **Free** |
| Rating | **[4.7 (6.9K ratings)](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611/reviews)** | [4.6 (118 ratings)](https://appshunter.io/ios/app/smarternoise/id1384299042/reviews) |
| Number of ratings | **6.9K** | 118 |
| Positive reviews | 74.2% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#130** | — |
| Size | 24 MB | 27 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)

**Currently charting:** #130 Top Paid · Utilities (US App Store)

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, iPhone Duo 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

[App page](https://appshunter.io/ios/app/smarternoise/id1384299042)

This app measures sound levels, records audio and video, and provides information on noise exposure risks. It features smart icons to help users understand the impact of noise on health and cognitive performance. Save, share, and archive your recordings with this comprehensive tool.

**Highlights:** Sound level measurement, Video and audio recording, Noise exposure risk information, Smart icons for health impact, Archive and sharing of recordings, Calibration, Location and time display

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Long-term measurement | $1.99 | one-time |
| Remove ads | $2.99 | one-time |


## Frequently asked questions

### Is Decibel X PRO free?

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

### Is SmarterNoise free?

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

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

Decibel X PRO is rated higher. Decibel X PRO averages 4.7 out of 5 from 6.9K ratings, while SmarterNoise averages 4.6 from 118 ratings.

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

SmarterNoise shows ads; Decibel X PRO does not.

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

Decibel X PRO ships an update every 3 months, and SmarterNoise every 6 weeks. Most recently, Decibel X PRO was updated on November 6, 2026 and SmarterNoise on November 2, 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.*