# Decibel - Accurate dB Meter

> Accurate sound pressure level meter for measuring decibels. (iPhone/iPad app by 祥祎 刘.)

- Source: https://appshunter.io/ios/app/decibel-accurate-db-meter/id1130936133 (this page in markdown: same URL + `.md`)
- Developer: [祥祎 刘](https://appshunter.io/developer/1071522659)
- Category: Utilities, Productivity
- Price: Free
- Rating: 3.50/5 from 475 App Store ratings · 287 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 4 MB
- Languages: American English, Japanese, European Portuguese, Russian, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2016-07-05
- Data updated: 2026-08-28
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/decibel-accurate-db-meter/id1130936133/reviews.md

## What is Decibel?

This tool is absolutely free.

Decibel Meter turns your iPhone, iPad and iPod touch into a professional accurate sound meter, precisely measures the sound pressure level all around you. This extremely useful tool. Have you wondered how quiet is your room or how loud is a rock concert or sport event? Decibel Meter will help you answer all those right now. 

A decibel meter is a device which measures sound pressure to determine how intense sounds are, measuring in decibels. Decibels are a logarithmic scale based on the sensitivity of the human ear. Prolonged exposure to sounds over 85 decibels can lead to hearing loss, making measurement of decibel levels important for people who work in noisy environments so that they know when they need to protect their ears.

For a frame of reference, normal conversation occurs between around 40 and 60 decibels, depending on who is talking. A firecracker is about 140 decibels, and a jackhammer runs at around 100 decibels. Musicians, mechanics, construction workers, and other people who work in loud environments can endanger their hearing, especially if they work in environments with explosives, which can generate sound waves intense enough to cause pain and immediate hearing damage. A decibel meter can indicate when sound has reached the danger zone.

The decibel meter measures the sound pressure and provides a reading in decibels for the convenience of the user. Some may also provide readings in other units of measurement, depending on the uses they are intended for. Decibel meters are often designed to be portable so that people can move them around as needed, and are often hand held, although sometimes they can be part of a permanent instrument array which is designed to take continuous measurements in a given area. 

One application in which a decibel meter can be used is in the reinforcement of municipal codes. Many municipalities bar sounds above a certain decibel level for safety and comfort, and may have restrictions on noise during certain hours. Police officers can carry decibel meters to determine whether or not a sound is violating the noise ordinance. These devices are also used in noise pollution studies which are used to determine the impact of passing vehicles, aircraft, and other sound-generating objects on a community.

The decibel meter is also used in the music industry, during recording and setting up for concerns as well as monitoring of conditions in a concert. Similarly, meters may be installed in noisy workplaces to monitor conditions, and may be designed to send out alerts when people need to wear ear protection or take other precautions to protect their hearing. These devices are also utilized in testing of hearing protection such as ear plugs and headphones, with such products coming with a decibel ratings to provide an indicator as to which settings they can and should be used in.

## Key features

- Accurate sound pressure level measurement
- Measures decibels (dB)
- Provides real-time sound intensity readings
- Useful for understanding noise pollution
- Helps identify potential hearing hazards

## What do users think of Decibel?

Overall sentiment: negative

**Pros**

- 👍 Simple and intuitive
- 💡 Useful for measuring noise levels
- 🚀 Easy to use
- 🔍 Provides instant and average readings

**Cons**

- 🐛 Inaccurate readings
- 🔍 Overly sensitive microphone
- 🔍 Inconsistent measurements
- 🔍 Readings too high compared to other apps

**Commonly reported bugs**

- App shows high decibel readings even in silent environments
- Microphone issues causing inaccurate measurements
- App freezes or stops working

**Most requested features**

- Ability to calibrate the app
- Option to record and save measurement history
- Add peak hold feature
- Improve spelling and grammar

## Recent user reviews (10 of 287)

All indexed reviews: https://appshunter.io/ios/app/decibel-accurate-db-meter/id1130936133/reviews.md

### 1/5 — Bad

*2025-12-05, version 7.0*

It is trash

### 1/5 — 不准

*2025-11-03, version 7.0*

差太多了 毫无参考性

### 5/5 — Great!

*2025-10-10, version 7.0*

Usefull & accurate

### 5/5 — Nota mil!

*2025-08-05, version 7.0*

Muito bommmm

### 5/5 — Pretty good

*2025-07-11, version 7.0*

Pretty damned good for what I need, it’d be handy if it had a report generator that saved a PDF report so that it could be used as evidence for noisy areas!

### 1/5 — It doesn’t work !

*2025-06-21, version 7.0*

It doesn’t work !

### 5/5 — Excellent

*2025-06-16, version 7.0*

For me, works very well. Quite often in loud environments and it is great for alerting me.

### 5/5 — Free Anti-Noise Tool

*2025-04-29, version 7.0*

Awareness is the first step to change - the tool offers a free possibility to evaluate how noisy is the environment one is immersed in. There is dynamic bar accompanied by numeric counter of dB, there is also minute average value displayed. Many thanks to the Developers!

### 1/5 — Hopeless

*2025-03-20, version 7.0*

It doesn’t work.

### 1/5 — Not accurate at all ,house all quiet and meter goes to 60db , should be 0

*2025-02-22, version 7.0*

Bad

## Frequently asked questions about Decibel

### What does the Decibel Meter app do?

This app turns your iPhone, iPad, or iPod touch into a professional and accurate sound meter. It precisely measures the sound pressure level all around you, allowing you to understand how loud your environment is in decibels.

### What are the key features of this decibel meter?

The app accurately measures sound pressure levels in decibels (dB). It provides real-time readings, helping users understand ambient noise intensity and identify potential hearing hazards in various environments.

### Is this app free to use?

Yes, this tool is absolutely free. There are no costs associated with downloading or using its features for measuring sound pressure levels.

### What devices is this app compatible with?

The app is designed to work on iPhone, iPad, and iPod touch devices, transforming them into accurate sound meters.

### How can I use this decibel meter?

You can use this app to measure the quietness of your room, the loudness of events like concerts or sports, or to monitor noise levels in workplaces. It's also useful for understanding potential hearing damage risks from prolonged exposure to high decibel levels.

## Version history (last 4 releases)

### 7.0 — 2025-01-23

Updated for iOS18

### 6.0 — 2018-12-27

Updated for XR XS Max

### 5.2 — 2017-07-02

redesigned icon

### 4.1 — 2016-07-05

No release notes.

## Apps similar to Decibel

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Decibel Meter-measure db level](https://appshunter.io/ios/app/decibel-meter-measure-db-level/id1274038012) | 4.3 (905) | Free | Utilities |
| [Sound Meter - Decibel Pro](https://appshunter.io/ios/app/sound-meter-decibel-pro/id1603557612) | 4.3 (29) | Free | Utilities |
| [Sound Meter (SPL meter)](https://appshunter.io/ios/app/sound-meter-spl-meter/id1558634102) | — | $0.99 | Utilities |
| [Decibel: dB Sound Meter](https://appshunter.io/ios/app/decibel-db-sound-meter/id1620285258) | 4.0 (6) | Free | Utilities |
| [Decibels: dB Sound Level Meter](https://appshunter.io/ios/app/decibels-db-sound-level-meter/id383207286) | 4.6 (261) | Free | Utilities |
| [dBMeter - Decibelmeter](https://appshunter.io/ios/app/dbmeter-decibelmeter/id1466056567) | 3.4 (7) | Free | Utilities |

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All apps by 祥祎 刘: https://appshunter.io/developer/1071522659

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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 2026-08-28.*