# Wonder Decibel - Voice Meter — Noise App & DB Reader

> Professional sound meter with noise classification, frequency weighting, and reporting. (iPhone/iPad app by 小利 薛.)

- Source: https://appshunter.io/ios/app/wonder-decibel-voice-meter/id6757120222 (this page in markdown: same URL + `.md`)
- Developer: [小利 薛](https://appshunter.io/developer/1675817893)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 4 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 12 MB
- Languages: English
- Released: 2026-01-10
- Data updated: 2026-08-13
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/wonder-decibel-voice-meter/id6757120222/reviews.md

## What is Wonder Decibel?

Wonder Decibel transforms your iPhone into a professional acoustic lab, blending scientific precision with intuitive design for deeper insight into any sound environment.

**Understand Your Sound Environment Instantly**

More than just a decibel meter, Wonder Decibel interprets what the numbers mean. Our intelligent **Noise Level Classification** feature instantly translates raw decibel readings into meaningful categories – from "Quiet Library" to "Hazardous Noise." Get immediate, human-readable feedback on your acoustic environment, empowering you to take action when it matters most.

**Professional-Grade Measurement for Every Scenario**

Whether you're monitoring workplace safety, assessing environmental noise, or analyzing audio equipment, Wonder Decibel delivers laboratory-grade precision with support for **three essential frequency weightings**: 
- **dBA** – Optimized for environmental and occupational noise assessment
- **dBC** – Ideal for measuring industrial and entertainment sound levels
- **dBZ** – Captures peak impulse sounds with unmatched accuracy

**Visualize Sound in Real Time**

See what you're hearing with our sophisticated **Triple Visualization System**:
- **Waveform Display** – Track sound pressure variations in real time
- **FFT Analysis** – Deconstruct audio into its frequency components
- **Spectrogram View** – Observe how frequency content evolves over time

These professional tools reveal patterns and characteristics invisible to standard meters, perfect for audio engineers, researchers, and curious minds.

**Never Lose Track of Your Measurements**

Every reading tells a story. Wonder Decibel automatically creates a **Detailed Measurement Log** for each session, preserving:
- Precise GPS location with map integration
- Accurate timestamps and duration data
- Measurement type and environmental conditions
- Custom notes and tags for easy organization

Your complete measurement history is always accessible, searchable, and exportable.

**Capture Visual Evidence with Data Overlay**

A picture is worth a thousand measurements. Our innovative **Media Capture System** allows you to:
- Take photos with real-time sound levels displayed on-screen
- Record videos with continuous decibel readouts
- Automatically embed measurement data into image metadata
- Create compelling visual documentation for reports and presentations

**Create Professional Reports in Minutes**

Transform raw data into polished deliverables with our **Advanced Reporting Engine**:
- Generate comprehensive PDF reports with charts and graphs
- Include measurement details, location maps, and captured media
- Share instantly via email, cloud services, or messaging apps
- Export raw data for further analysis in spreadsheet applications

**Perfect For:**
- **Occupational Health & Safety** professionals monitoring workplace compliance
- **Audio Engineers & Musicians** analyzing acoustics and equipment
- **Event Planners** ensuring venue compliance with regulations
- **Property Managers** documenting noise complaints and assessments
- **Educators & Students** exploring the science of sound
- **Homeowners** monitoring neighborhood noise levels
- **Industrial Hygienists** conducting comprehensive sound evaluations

**Subscription Service**
When you subscribe to the "VIP Subscription" service, you will enjoy the following benefits:
1. Unrestricted access to all features.
2. AI content recommendations based on usage habits.

Payment for subscriptions is straightforward—the user's iTunes account is credited immediately after confirmation of purchase and payment. Please note that the Apple iTunes account will be automatically debited 24 hours prior to expiration. Upon successful deduction, the subscription term will be extended by one subscription cycle.
User Agreement: https://www.wonderda.com/agreement.html
Privacy Agreement: https://www.wonderda.com/privacy.html

## Key features

- Noise Level Classification
- Multiple Frequency Weightings (dBA, dBC, dBZ)
- Triple Visualization System (Waveform, FFT, Spectrogram)
- Detailed Measurement Log with GPS
- Media Capture with Data Overlay
- Advanced Reporting Engine

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| VIP Subscription Service | $2.99 | per month |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/wonder-decibel-voice-meter/id6757120222/reviews.md

### 5/5 — Very stable app

*2026-02-28*

I've tried a few other sound meters and they often crash or freeze. Wonder Decibel has been rock solid on my iPhone. It's lightweight and doesn't seem to drain the battery much.

### 5/5 — Straightforward and easy

*2026-02-27*

No steep learning curve here. You just open the app and it starts measuring. I love that it gives you a reference, so you actually understand what the numbers mean.

### 5/5 — Beautiful and functional

*2026-02-26*

Most decibel apps look like they were designed in 2010, but Wonder Decibel is sleek and modern. It fits perfectly with the iOS aesthetic. I love the minimalist approach—it just works.

### 5/5 — Surprisingly accurate!

*2026-02-24*

I cọmpared this with a professional handheld decibel meter I use for work, and the results were remarkably close. The UI is clean, and there are no annoying ads popping up every second. Definitely my go-to sound meter now.

### 5/5 — Helpful for my sleep environment

*2026-02-11*

I live in a noisy neighborhood and wanted to see how loud it actually gets at night. This app is perfect for logging noise levels. It’s helped me realize when I need to turn on my white noise machine. Very handy tool.

## Frequently asked questions about Wonder Decibel

### What is Wonder Decibel?

Wonder Decibel is a utility app that turns your iPhone or iPad into a professional acoustic lab. It provides precise sound environment analysis, noise level classification, and detailed reporting features.

### What are the key measurement features of Wonder Decibel?

Wonder Decibel supports three essential frequency weightings: dBA for environmental and occupational noise, dBC for industrial and entertainment sound, and dBZ for peak impulse sounds. It also offers waveform display, FFT analysis, and spectrogram view.

### Can Wonder Decibel help with documentation?

Yes, Wonder Decibel features a Media Capture System to take photos and record videos with real-time sound levels displayed. It also has an Advanced Reporting Engine to generate comprehensive PDF reports with charts, graphs, and embedded media.

### Does Wonder Decibel have ads?

No, Wonder Decibel does not contain advertisements, offering an uninterrupted user experience.

### What devices is Wonder Decibel compatible with?

Wonder Decibel is available for iPhone and iPad devices.

### How does Wonder Decibel classify noise levels?

The app's intelligent Noise Level Classification feature translates raw decibel readings into meaningful categories, such as 'Quiet Library' or 'Hazardous Noise,' providing immediate, human-readable feedback on your acoustic environment.

### Is my measurement data saved in Wonder Decibel?

Yes, Wonder Decibel automatically creates a Detailed Measurement Log for each session, preserving GPS location, timestamps, duration, measurement type, environmental conditions, and custom notes. This history is accessible, searchable, and exportable.

### What is the age rating for Wonder Decibel?

Wonder Decibel has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 3 releases)

### 2.1 — 2026-04-04

Thanks for staying with us! In this version, you'll find:
1. Compatible with the latest iOS system
2. Fix bugs

### 2.0 — 2026-01-29

Thanks for staying with us! In this version, you'll find:
1. Upgrade audio monitoring-related features
2. Fix bugs

### 1.0 — 2026-01-10

No release notes.

## Apps similar to Wonder Decibel

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Decibels](https://appshunter.io/ios/app/decibels/id6749821741) | — | Free | Utilities |
| [Flooring & Tile Calculator](https://appshunter.io/ios/app/flooring-and-tile-calculator/id6759358993) | — | Free | Utilities |
| [Easy Sound Meter](https://appshunter.io/ios/app/easy-sound-meter/id6759787881) | — | Free | Utilities |
| [Decibel Meter: dB Sound Level](https://appshunter.io/ios/app/decibel-meter-db-sound-level/id6756241739) | 5.0 (2) | Free | Utilities |
| [MATCO TOOLS- SmartEAR1](https://appshunter.io/ios/app/matco-tools-smartear1/id949048686) | 2.3 (8) | Free | Utilities |
| [dB Snap: Decibel Meter](https://appshunter.io/ios/app/db-snap-decibel-meter/id6757163427) | — | Free | Utilities |

## More apps by 小利 薛

- [Wonder Shield - Call Filter](https://appshunter.io/ios/app/wonder-shield-call-filter/id6447752194)
- [Wonder Sleep - Sleepy Sounds](https://appshunter.io/ios/app/wonder-sleep-sleepy-sounds/id6747338147)
- [Wonder Quit - Smoke Free](https://appshunter.io/ios/app/wonder-quit-smoke-free/id6748075326)
- [Wonder Food - Healthy App](https://appshunter.io/ios/app/wonder-food-healthy-app/id6751926165)
- [Wonder TV - Universal Control](https://appshunter.io/ios/app/wonder-tv-universal-control/id6752973759)
- [Wonder Lock - Lock Apps](https://appshunter.io/ios/app/wonder-lock-lock-apps/id6753611058)

All apps by 小利 薛: https://appshunter.io/developer/1675817893

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*