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Decibel : dB sound level meter

Decibel : dB sound level meter

Audio noise Spectrum Analyzer

36K ratings
510 reviews
🔧 Utilities
💪 Health & Fitness
Free
In-App Purchases

Details

  • Released
  • Updated

Features

Developer

Vlad Polyanskiy
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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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🧾$4.99 - $49.99
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❓5 answered
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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

Summarized from real user reviews of Decibel. Based on 36K reviews and a 4.6/5 average, it highlights the 5 positives and 5 negatives reviewers mention most about this Utilities app.

Positive things

  • 👍Useful for monitoring noise levels
  • 🔍Accurate for a phone app
  • 🔧Good for calibrating audio equipment
  • 💡Helpful for hearing protection
  • 📊Provides detailed measurements

Negative things

  • 💰Aggressive upselling tactics
  • 🔒Privacy concerns around data collection
  • 🕹️Confusing free vs paid options
  • 🔁Recurring subscription issues
  • 🔢Inconsistent/inaccurate readings
See all reviews

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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Subscriptions & In-App Purchases

Premium Mode Subscription

Access to all available Pro features

$9.991 Month
How to cancel Decibel subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Support bouncebacks

On a week’s trial, have a question about timestamps on saved files.
“Button at the bottom” on Help section of the app isn’t there and emails to support bounced back “Unable to deliver message after multiple retries, giving up.”
CCGD76CCGD76

Good app

Useful without a subscription Five stars for you guys
Bob.w122Bob.w122

Excellent

Great app to learn about sound and sound level effects
The Curious Constant SeekerThe Curious Constant Seeker

Use this app to check the decibels surrounding you

One if you use plus you can actually check everything and also I actually recommend you getting plus I mean not plus premium, and plus download this app because this app is the best app to check your decibels
Ja obvioJa obvio

App no longer useable

I bought this app before it went to subscription service and now it will not work unless I subscribe. Is there a way to gain access for those of us who bought this app before it was subscription? I believe we should be grandfathered in since we agreed to pay for the use of the app at the time of purchase. This feels like breach of contract.
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Nlindsay3Nlindsay3
See 505 more reviews

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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.