# Decibel Detector vs SonoMeter

The clearest difference is in-app purchases: Decibel Detector at none against SonoMeter's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SonoMeter sells 4 in-app purchases, starting at $1.99 per 7 days. Decibel Detector asks for nothing beyond the download.

Decibel Detector ships an update every 5 months, SonoMeter every 8 months. Both last shipped on November 8, 2026.

## The numbers

| Metric | Decibel Detector | SonoMeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-detector/id6745181319/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 8 months |
| Monetization | Free | — |
| Size | 33 MB | 35 MB |
| Requires iOS | **15.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [北京泰燊信息技术有限公司](https://appshunter.io/developer/1784907008) | [Raphael Goupille](https://appshunter.io/developer/1650597250) |

## What reviewers say

### Decibel Detector

[App page](https://appshunter.io/ios/app/decibel-detector/id6745181319)

This app provides real-time environmental noise monitoring and data tracking. It offers smart alerts for custom noise thresholds and generates professional PDF reports. Adaptable to various scenarios, it helps users understand acoustic data and identify sound sources.

**Highlights:** Real-time decibel monitoring, Historical data tracking, Customizable smart alerts, Multi-scenario adaptation, Professional PDF reporting, FFT spectrum analysis, Environmental noise classification

**Features:** macOS Compatibility

**In-app purchases:** none


### SonoMeter

[App page](https://appshunter.io/ios/app/sonometer-decibel-meter/id6745488403)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly subscription | $5.99 | per month |
| Annual subscription | $24.99 | per year |
| Premium Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is Decibel Detector free?

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

### Is SonoMeter free?

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

### Do Decibel Detector or SonoMeter have ads?

Neither Decibel Detector nor SonoMeter shows ads.

### Which is updated more often, Decibel Detector or SonoMeter?

Decibel Detector ships an update every 5 months, and SonoMeter every 8 months. Most recently, Decibel Detector was updated on November 8, 2026 and SonoMeter on November 8, 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.*