# Noise Meter - Noise Monitor — sound meter, decibel meter

> Professional sound level meter and noise monitor with historical tracking. (iPhone/iPad app by John Xu.)

- Source: https://appshunter.io/ios/app/noise-meter-noise-monitor/id6780465715 (this page in markdown: same URL + `.md`)
- Developer: [John Xu](https://appshunter.io/developer/1863850937)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.6 · 3 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-06-28
- Data updated: 2026-09-18
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/noise-meter-noise-monitor/id6780465715/reviews.md

## What is Noise Meter?

Transform Your Device Into a Professional Sound Level Meter

Noise Meter delivers laboratory-grade noise monitoring right on your device. Whether you're an occupational safety professional, audio engineer, or simply concerned about noise exposure, our app provides the precision tools you need to measure, track, and analyze sound levels in any environment.

PROFESSIONAL MEASUREMENT TOOLS

• Real-time decibel monitoring with smooth animations
• A, C, and Z frequency weighting support
• Multiple industry standards (OSHA, NIOSH, EU)
• Peak, minimum, and maximum level tracking
• LAeq (equivalent continuous sound level)
• TWA (time-weighted average) calculations
• Noise dose percentage monitoring
• Maximum safe exposure time estimates

MODERN INTERFACE

Experience sound measurement reimagined with our stunning visual design:
• Dynamic animated gauge with color-coded risk levels
• Real-time waveform backgrounds that respond to noise
• Glass-style cards with elegant data presentation
• Smooth transitions and haptic feedback
• Easy-to-read statistics at a glance

COMPREHENSIVE HISTORY & TRACKING

Never lose a measurement with our robust history features:
• Automatic session recording and storage
• Detailed measurement sessions with full statistics
• Time-stamped data for compliance documentation
• Historical trend analysis
• Export capabilities for reporting

OCCUPATIONAL SAFETY COMPLIANCE

Built with workplace safety in mind:
• OSHA 1910.95 standard support
• NIOSH recommended exposure limits
• European Union directive compliance
• 8-hour dose projections
• Action level and criterion level indicators
• Safe exposure time calculations

AUDIO WEIGHTING OPTIONS

Choose the right weighting for your needs:
• A-weighting: Human hearing perception (most common)
• C-weighting: High-level measurements and peak sounds
• Z-weighting: Flat frequency response for technical analysis

PERFECT FOR

• Occupational health and safety professionals
• Construction site monitoring
• Factory and industrial environments
• Audio engineers and musicians
• Home theater calibration
• Noise complaint documentation
• Environmental noise assessment
• Hearing protection awareness
• Educational purposes

PRIVACY FOCUSED

Your measurement data stays on your device. We don't collect, store, or transmit your sound measurements to any external servers. All data remains private and under your control.


Download Noise Monitor - 噪音計 today and take control of your acoustic environment. Protect your hearing, ensure workplace safety, and make informed decisions about noise exposure.

## Key features

- Real-time decibel monitoring
- A, C, and Z frequency weighting
- Industry standard compliance (OSHA, NIOSH)
- Peak, minimum, and maximum level tracking
- Automatic session recording and storage
- Historical trend analysis
- Export capabilities

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 20 Spirit Stones | $0.99 | one-time |
| 100 Spirit Stones | $2.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/noise-meter-noise-monitor/id6780465715/reviews.md

### 5/5 — Very helpful

*2026-06-29*

Easy to use

## Frequently asked questions about Noise Meter

### What is the accuracy of Noise Monitor?

Noise Monitor aims to provide laboratory-grade noise monitoring. While it transforms your device into a professional sound level meter, the accuracy can depend on your device's microphone. It supports various industry standards like OSHA and NIOSH for professional measurement.

### Does Noise Monitor have ads?

No, Noise Monitor is ad-free. The app is designed to provide an uninterrupted and professional user experience for sound measurement and analysis.

### What devices does Noise Monitor support?

Noise Monitor is available for iPhone and iPad devices. It is designed to work on these Apple platforms.

### How does Noise Monitor help with occupational safety?

Noise Monitor supports multiple industry standards, including OSHA 1910.95, NIOSH recommended limits, and EU directives. It provides 8-hour dose projections, action level indicators, and safe exposure time calculations to help ensure workplace safety.

### Can I export my noise measurement data from Noise Monitor?

Yes, Noise Monitor offers export capabilities for reporting. This feature is useful for documentation, compliance, and sharing detailed measurement sessions with full statistics.

### What are the different audio weighting options in Noise Monitor?

Noise Monitor supports A-weighting for human hearing perception, C-weighting for high-level and peak sounds, and Z-weighting for flat frequency response in technical analysis.

### How often is Noise Monitor updated?

The latest version of Noise Monitor is 1.1, which was last updated on August 31, 2026. Updates typically include improvements and new features based on user feedback and technological advancements.

### Is my measurement data kept private with Noise Monitor?

Yes, Noise Monitor is privacy-focused. Your measurement data stays on your device, and the app does not collect, store, or transmit your sound measurements to any external servers, ensuring your data remains private and under your control.

## Version history (last 3 releases)

### 1.1.1 — 2026-09-07

localized name and subtitle ONLY. nothing else changed.

To reviewers,
Please don't "shoot down a strawman". This app do not use HealthKit, nor CareKit - it is against our core value of "Security First". I have tested and use chatgpt and claude to verify it. But I welcome any constructive objections with screenshots or evidence to make sure no HealthKit/CareKit is completely absent. If you can use LLM to test and point out any evidence, that will make our app most secure in the world.

### 1.1 — 2026-08-31

1. added localized texts for japanese, korean, chinese(simplified), chinese(traditional)
2. added localized onboarding flow.
3. In-App Purchase added Korean localization (since japanese, chinese are already localized)

For reviewers:
Note to test in-app purchase paywall. There are six free sound measures before app asking user to pay in paywall (this is an existing feature in app to allow users try it before pay).

### 1.0 — 2026-06-28

No release notes.

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## More apps by John Xu

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All apps by John Xu: https://appshunter.io/developer/1863850937

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*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 2026-09-18.*