# Decibel Pro vs CHC

The clearest difference is update cadence: CHC at daily against Decibel Pro's every 36 months. CHC also leads on iOS requirement (12.0 vs 16.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Decibel Pro ships an update every 36 months, CHC daily. The most recent releases landed on November 4, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Decibel Pro | CHC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (75 ratings)](https://appshunter.io/ios/app/decibel-pro-sound-level-meter/id6471412443/reviews)** | — |
| Number of ratings | **75** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Daily** |
| Monetization | Free | — |
| Size | 14 MB | 40 MB |
| Requires iOS | 16.1 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Emre Can Altaca](https://appshunter.io/developer/1589836507) | [GLOBAL CONSUMERS CONSULTING SERVICES JOINT STOCK COMPANY](https://appshunter.io/developer/1588183541) |

## What reviewers say

### Decibel Pro

[App page](https://appshunter.io/ios/app/decibel-pro-sound-level-meter/id6471412443)

Transform your device into a professional sound level meter and noise dosimeter. Track real-time audio levels, monitor daily noise exposure, and generate detailed reports with photos and videos. Customize settings for various environments and receive alerts for loud noises.

**Highlights:** Real-time sound level readings (dBA, dBC, dB), Noise dosimeter with OSHA/NIOSH standards, Background measurement with Live Activity, Save and export measurements (PDF, CSV), Photos/videos with sound level stamps, Customizable alerts and profiles, Sync with Apple Health

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

**In-app purchases:** none


### CHC

[App page](https://appshunter.io/ios/app/chc/id6743326298)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Pro free?

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

### Is CHC free?

CHC is free to download, with no in-app purchases.

### Do Decibel Pro or CHC have ads?

Neither Decibel Pro nor CHC shows ads.

### Which is updated more often, Decibel Pro or CHC?

Decibel Pro ships an update every 36 months, and CHC daily. Most recently, Decibel Pro was updated on November 4, 2026 and CHC on October 4, 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.*