Decibel : dB sound level meter

Decibel : dB sound level meter

Audio noise Spectrum Analyzer

36K ratings
463 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated

Features

Decibel : dB sound level meter screenshot #1 for iPhone
Decibel : dB sound level meter screenshot #2 for iPhone
Decibel : dB sound level meter screenshot #3 for iPhone
Decibel : dB sound level meter screenshot #4 for iPhone
Decibel : dB sound level meter screenshot #5 for iPhone
Decibel : dB sound level meter screenshot #6 for iPhone
Decibel : dB sound level meter screenshot #7 for iPhone
Decibel : dB sound level meter screenshot #8 for iPhone
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About

Transform your device into a professional sound level meter and audio analyzer. Measure ambient noise, monitor decibel levels, and visualize sound frequencies in real time. It also offers advanced sleep tracking with sound recognition to identify disruptions.

Real-time decibel (dB) sound level monitoring
Integrated Spectrum Analyzer (FFT, spectrogram)
Sleep tracking with sound recognition
Noise exposure data export to Health app
Add sound level overlays to photos/videos
Save, export, and playback sound measurements
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What users say

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What's New in Decibel

9.5.3

February 12, 2026

• UI optimizations for iPhone Air • In some rare cases, audio processing caused the app to crash on iOS versions prior to 26. This update may fix this issue. Do you like the new version of the app? Share your review on the App Store. Do you dislike anything about it? All the more reason to say something! Your comments help make the app better and I'm value them greatly so don't hesitate to share them.

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Subscription plans

Premium Mode Subscription

Access to all available Pro features

$9.991 Month
How to cancel Decibel subscription ⁉️
12

In-App Purchases

$19.99

Decibel Meter Pro

Save. Export. Get access to dB-A, C, Z

User reviews

Doesn’t work with AirPods Pro even after buying Premium Pack.

I bought the Premium Pack - supposedly with all features included - because I saw it had a lot of potential use for me. Really wanted to use it with my AirPods Pro but the app always said they weren’t connected even though they were. No response from dev after logging an issue a few days ago.

At this price I expect both that it works without hassle and if there’s issue a prompt response from the dev team.
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Keeps freezing up

I recently purchased the one year membership as things were working good, all of a sudden it will freeze up and stay at zero or whatever DB number it’s at.
Next, I have to unplug, the microphone restart the app plug everything back in and sometimes it works. Sometimes it doesn’t.
There are times I don’t have time to do that during a service. I need the DB information as soon as it hits the meter. Please fix the bug or I will request a refund.
With Respect,
Professor Bobby Glass
Navy Veteran (AW/SW)
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Forced to pay to save

Can no longer save videos without paying

Not free

Not cool to advertise it as if its free…

love it

the user experience has been exceptional!!

Developer apps

User experience

🐞

Reported Bugs

3 issues

App crashes or freezes during use

Bug

Subscription issues and unwanted charges

Bug

Microphone compatibility problems

Bug

Requested Features

4 requests

Add option to set noise level alerts

Feature

Improve geolocation and recording features

Feature

Allow audio playback while using the app

Feature

Provide more calibration options

Feature

FAQ

What does the Decibel app do?

Decibel transforms your device into a powerful sound level meter and audio analyzer. It allows you to measure ambient noise in real time, monitor decibel levels, and explore sound frequencies using its integrated Spectrum Analyzer. The app also features sleep tracking with smart sound recognition to identify nighttime disruptions.

What are the key features of Decibel?

Key features include real-time visualization of ambient sound levels and decibel readings, integration with the Health app for noise exposure tracking, the ability to add live sound level overlays to photos and videos, saving sound measurements with location data, and recording, storing, exporting, and playing back sound measurements. It also offers an advanced Spectrum Analyzer with FFT and spectrogram modes.

How does the sleep tracking feature work?

The sleep tracking feature uses smart sound recognition to detect common sleep sounds like snoring, coughing, or talking, as well as other household or environmental noises that might affect sleep quality. Detected sounds are displayed on a detailed sleep timeline, allowing you to see when disruptions occurred and play back the related audio for analysis. All processing is done on-device for privacy.

Is Decibel free to use?

Decibel offers optional subscriptions that unlock advanced tools and ongoing feature enhancements. While the app provides core sound measurement functionalities, certain advanced features and continuous updates are available through these subscriptions. The app also has in-app purchases and may display ads.

Can I use external microphones with Decibel?

Yes, the app supports external microphones. You can calibrate connected microphones directly within the app and create custom profiles for different microphones. This allows for more precise and tailored audio measurements.