# Decibel Detector vs SoundLog

The clearest difference is in-app purchases: Decibel Detector at none against SoundLog's 4. SoundLog's advantage is update cadence (every 4 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SoundLog sells 4 in-app purchases, starting at $2.99 per month. Decibel Detector asks for nothing beyond the download.

Decibel Detector ships an update every 5 months, SoundLog every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Decibel Detector | SoundLog |
| --- | --- | --- |
| 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 4 days** |
| Monetization | Free | — |
| Size | 33 MB | 83 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [北京泰燊信息技术有限公司](https://appshunter.io/developer/1784907008) | [Kenichi Tabata](https://appshunter.io/developer/1896292479) |

## 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


### SoundLog

[App page](https://appshunter.io/ios/app/soundlog-noise-tracker/id6766467501)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SoundLog Pro (Monthly) | $2.99 | per month |
| SoundLog Pro (Yearly) | $17.99 | per year |
| Single Report | $1.99 | one-time |
| 3-Report Pack | $2.49 | one-time |


## Frequently asked questions

### Is Decibel Detector free?

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

### Is SoundLog free?

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

### Do Decibel Detector or SoundLog have ads?

Neither Decibel Detector nor SoundLog shows ads.

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

Decibel Detector ships an update every 5 months, and SoundLog every 4 days. Most recently, Decibel Detector was updated on October 30, 2026 and SoundLog on October 31, 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.*