# Decibel - sound level meter — Spectrum frequency analyzer

> Sound level meter and spectrum analyzer with reference charts and recording history. (iPhone/iPad app by App Rover.)

- Source: https://appshunter.io/ios/app/decibel-sound-level-meter/id1485543216 (this page in markdown: same URL + `.md`)
- Developer: [App Rover](https://appshunter.io/developer/1448355489)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 4,682 App Store ratings · 112 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 27 MB
- Languages: American English
- Released: 2020-01-24
- Data updated: 2026-08-28
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/decibel-sound-level-meter/id1485543216/reviews.md

## What is Decibel?

Decibel is the perfect app to evaluate the noise around you : measure the sound pressure, see the spectrum variation, and then compare your recording to the reference chart included in the app. Is it similar to a normal conversation ? a diesel truck? a rocket launch ? Figure it out !

Calibrated professionally, It supports dBa, dBb, dBc and dBz, for a customized and highly reliable recording. One of the most complete app for your sound measurements!

You can save an history of your recording and spectrum - keep track of your last actions !


KEY FEATURES
measure accurately the sound pressure around you
supports dBa, dBb, dBc and dBz
recordings and spectrum can be saved
detailed reference chart to compare your measurements
unlimited recordings
unique and intuitive interface


SUBSCRIPTION INFORMATION

- Subscribe for unlimited access to our Premium pack and special features
- Monthly subscription ($4.49) / Yearly subscription ($16.99)
- Free trial subscription is automatically renewed unless cancelled 24 hours before the renewal
- Payment will be charged to iTunes Account at confirmation of purchase
- Account will be charged for renewal within 24-hours prior to the end of the current period, at the same price
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

Privacy Policy & Terms of Service: http://musicworldmedia.com/products/decibel/tos

*Price are equal to the value that "Apple's App Store Matrix" determines is the equivalent of the subscription price in $USD.

## Key features

- Measure sound pressure
- Spectrum frequency analysis
- Reference chart comparison
- Save recording history
- Supports dBa, dBb, dBc, dBz
- Unlimited recordings

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Premium Pass | $4.49 | per month |
| Annually Premium Pass | $16.99 | per year |


## What do users think of Decibel?

Overall sentiment: neutral

**Pros**

- ✨ Accurate sound measurement
- 🔍 Helpful for verifying environmental noise
- 📊 Useful for monitoring job site noise levels
- 🔍 Good for deciding where to sit in restaurants

**Cons**

- 💰 Subscription-based model
- 🐛 Glitches and bugs
- 🔒 Security concerns (mic left open)
- 🙅‍♀️ Inability to turn off or exit the app

**Commonly reported bugs**

- Needle moving to strange places on the screen
- Inability to save or delete recordings
- Subscription not recognized after purchase
- App crashing on launch

**Most requested features**

- Preset noise level alarm
- Ability to play back and export recordings
- Frequency analysis beyond the first octave
- Multilingual support

## Recent user reviews (10 of 112)

All indexed reviews: https://appshunter.io/ios/app/decibel-sound-level-meter/id1485543216/reviews.md

### 5/5 — Accurate than other apps

*2026-08-10, version 1.01.00*

This app is quite accurate and easy to verify with the comparison on top of different environment. I measured in a relatively quiet room, it indicated ~40dB of "Quiet room" while another app "Sound Meter" indicated ~55dB of "Noise". Free version does not allow saving records

### 5/5 — Solid little app

*2026-04-28, version 1.01.00*

This does what it says and it's free.

### 1/5 — Does not work

*2026-01-14, version 1.01.00*

Work does not work

### 1/5 — Premium Push

*2025-11-19, version 1.01.00*

Every time I open the app it prompts 15 times to buy premium and anytime i do anything it wants me to buy premium. 1/5 stars. Too pushy

### 4/5 — Good and bad?

*2025-08-28, version 1.01.00*

I downloaded a dozen of these sound pressure level meter apps.  Most give obviously wildly inaccurate results like 80 dB in a quit room with no talking.  Insane.  This app gives nearly identical results when similtaneously running on iPhone and iPad.  The results were not only almost identical but believable with quiet room readings in the 35-40 dB range.  
All good.
The bad.  The apps description talks about a setup or setting screen where you can calibrate the microphone.  I can't find a setting screen or page anywhere.

### 1/5 — Ben B in Burlington VT

*2025-07-11, version 1.01.00*

I recently downloaded this sound level meter app and it seemed to be running continuously without my having to start recording. 
Somehow, I have now stopped it operating all together. There is no obvious “Start/Stop” toggle or button, only a Pause/Resume (recording) option. I’ve shut down and restarted my iPhone 15 but no change. The drop down menu only has options for the 4 different sensitivity decibel readings based on the type of noise to be recorded. 
At this point, I give this app one (1) Star unless I get help on instructions for operating this decibel reading app.

### 5/5 — I like it

*2025-05-16, version 1.01.00*

I like it. So sensitive too

### 1/5 — เยี่ยมลาว

*2024-11-13, version 1.01.00*

ทำใมเล่นบอกฟูดใม่ใด้คับ

### 5/5 — Great straight forward

*2024-10-19, version 1.01.00*

Use to measure sound in our church. And gives exactly what we need

### 1/5 — 🇨🇳🇮🇳

*2024-08-22, version 1.01.00*

cannot spell the words for different sound levels correctly in an app for publication. “rick and roll”.

## Frequently asked questions about Decibel

### What does the Decibel app do?

Decibel is an application designed to measure the sound pressure levels around you. It offers spectrum frequency analysis, allowing you to visualize sound variations and compare your recordings against a provided reference chart.

### What are the key features of Decibel?

Key features include accurate sound pressure measurement, support for various decibel scales (dBa, dBb, dBc, dBz), the ability to save unlimited recordings and their spectrum analysis, and a detailed reference chart for comparison. It also boasts a unique and intuitive interface.

### How much does Decibel cost?

The app offers a subscription model with monthly ($4.49) and yearly ($16.99) options for unlimited access to premium features. A free trial is available, which automatically renews unless canceled 24 hours before the renewal date.

### What devices is Decibel compatible with?

While specific device compatibility isn't detailed, the subscription information mentions payment being charged to an iTunes Account, suggesting it is available on iOS devices. Users can manage subscriptions and auto-renewal through their Account Settings.

### What are common use cases for Decibel?

Common use cases include evaluating ambient noise levels to understand if they are comparable to everyday sounds like conversations or louder noises like diesel trucks. Users can also track their sound measurements over time by saving their recording history.

## Version history (last 2 releases)

### 1.01.00 — 2020-05-13

We have fixed some minor crashes and updated the app for iPad.

### 1.00.00 — 2020-01-24

No release notes.

## Apps similar to Decibel

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Decibel : dB sound level meter](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795) | 4.6 (36,118) | Free | Utilities |
| [Decibel X:dB Sound Level Meter](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923) | 4.6 (160,618) | Free | Utilities |
| [Decibel X PRO: dBA Noise Meter](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611) | 4.7 (6,888) | $69.99 | Utilities |
| [Decibel Meter · Sound Analyzer](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1624503658) | 4.7 (1,296) | Free | Utilities |
| [Noise Guru: Decibel Meter](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813) | 4.6 (299) | Free | Utilities |
| [Decibel Meter - Sound Analyzer](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1579747105) | 3.5 (54) | Free | Utilities |

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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.*