Decibel Sir vs Decibel Detector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decibel Sir
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It’s an old fashioned style decibel mete mixed with new fashioned elements. Check out the highest and the average decibel by using it. You can set your personal noise-standard as well.
Decibel Detector
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.
- Real-time decibel monitoring
- Historical data tracking
- Customizable smart alerts
- Multi-scenario adaptation
- Professional PDF reporting
- FFT spectrum analysis
- Environmental noise classification
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Decibel Detector - Your Portable Environmental Noise Lab! Real-time Monitoring: Continuously track environmental decibel levels 24/7, with support for 1-second refresh rates. Data Tracking: Automatically save historical records and view acoustic trends by day/week/month. Smart Alerts: Set custom noise thresholds and receive instant push notifications when levels are exceeded. Multi-Scenario Adaptation: Switch seamlessly between preset modes for classrooms, offices, construction sites, concerts, and more. Professional Reporting: Generate PDF inspection reports, with support for data export and comparative analysis. Powered by FFT spectrum analysis technology, the app is compatible with smartphones and tablets. It features an environmental noise classification database capable of identifying common sound sources such as traffic noise and industrial machinery. With an intuitive dashboard and dynamic waveform display, complex acoustic data becomes easy to understand. Whether you're an occupational health and safety professional conducting compliance monitoring or a general user seeking a more comfortable living environment, this app delivers reliable data support. Continuous background monitoring is now available, so you never miss critical acoustic data. Download now and start your Quiet Protection Plan!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Decibel Sir | Decibel Detector |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 33 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 13 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | WonderfulCode | 北京泰燊信息技术有限公司 |
In-app purchases
Decibel Sir
No in-app purchases
Decibel Detector
No in-app purchases
Questions
Is Decibel Sir free?
Is Decibel Detector free?
Do Decibel Sir or Decibel Detector have ads?
Which is updated more often, Decibel Sir or Decibel Detector?
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