# Decibel Sir vs Decibel Detector

The clearest difference is update cadence: Decibel Detector at every 5 months against Decibel Sir's every 33 months. Decibel Sir's advantage is iOS requirement (8.0 vs 15.0). 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 Sir ships an update every 33 months, Decibel Detector every 5 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Decibel Sir | Decibel Detector |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 13 MB | 33 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [WonderfulCode](https://appshunter.io/developer/545115773) | [北京泰燊信息技术有限公司](https://appshunter.io/developer/1784907008) |

## What reviewers say

### Decibel Sir

[App page](https://appshunter.io/ios/app/decibel-sir/id935608173)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Decibel Sir free?

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

### Is Decibel Detector free?

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

### Do Decibel Sir or Decibel Detector have ads?

Neither Decibel Sir nor Decibel Detector shows ads.

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

Decibel Sir ships an update every 33 months, and Decibel Detector every 5 months. Most recently, Decibel Sir was updated on November 6, 2026 and Decibel Detector on October 30, 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.*