Decibel : dB Sound Level Meter 4+

Audio Noise Spectrum Analyzer

Vlad Polyanskiy

Designed for iPad

    • 4.6 • 5.4K Ratings
    • Free
    • Offers In-App Purchases


dB Meter is full of features sound level meter with exclusive accuracy of measurements plus Hearing test, Noise dosimeter, Spectrum Analyzer with RTA, FFT & Spectrogram.

Decibel Meter Pro is full of features sound level meter with exclusive accuracy of measurements and integrated Spectrum Analyzer. Calibrated with professional dB meter.

The world is a noisy place: cars, power tools, crowds, machinery, and other common sources produce amounts of noise that can, with continued exposure, lead to permanent hearing loss. Sound level meters are useful for anyone who wants to avoid exposing their ears to harmful noise levels, but who wants to spend hundreds of dollars on one?

dB Meter is free app which provides professional-quality measurement results, calibrated using an actual Nor140 high-precision decibel meter. With dB Meter, you can measure ambient noise levels, save your measurements and their locations, and share your measurements with others. dB Meter couples utility with stylish design and a polished user experience: a powerful tool in a sleek package, and at a tiny fraction of the cost of professional sound level meters.

(Please note that dB Meter Pro app is not a replacement for professional devices and should be used for personal purposes only.)

"The best way to meter sound levels" - AppAdvice

● Health App integration. Export measured noise levels directly to Health app.

● Saves location data for each measurement.

● Save measurements with custom names and rename existing measurements.

● Export measurements in CSV or Audio format.

● Allows you to save, export and play back recorded measurements.

● Highly accurate measurements.

● Integrated Fully Functional Spectrum Analyzer

● Octave Band Real Time Analyzer

● FFT Plot (Fast Fourier Transform)

● Linear and logarithm scales

● Up to 16384 FFT size

● A lot of available window functions

● Tracking for max value

● Max and Min for any selected frequency

● Stunned graphics

You can enable or disable noise levels data exporting to Health app in dB Meter Pro app settings.

Have any questions or suggestions? Write to us:

App offers an optional monthly and annual subscriptions:
Payment will be charged to your iTunes account at confirmation of purchase. Subscriptions will automatically renew unless autorenew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal in accordance with your plan, within 24-hours prior to the end of the current period. You can manage or turn off auto-renew in your Apple ID account settings any time after purchase. Please note, any unused portion of a free trial period will be forfeited when making a purchase of an auto-renewing subscription. View our Terms of Use here:

DB Chart
150-160 dB = Eardrum rupture
140 decibel = Aircraft carrier deck.
130 dB = Jet take-off (100 meters), gun blast at close range.
120 dB= Human pain threshold, loud rock concert.
110 decibel = Serious hearing damage if sustained for more than 1 hour.
100 dB = Serious hearing damage if sustained for more than 8 hours.
90 decibel = Likely hearing damage if sustained for more than 8 hours.
80 decibel = Potential but unlikely hearing damage if sustained for more than 8 hours.
70 dB = Just annoying, but probably safe.
60 dB= Typical conversational volume.
50 dB = A quiet, library conversation.
40 decibel = A whisper.
30 dB= Barely audible sound.
20 decibel= Threshold of human hearing.

What’s New

Version 9.3.1

• Minor bugfixes
• Stability improvements

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.

Ratings and Reviews

4.6 out of 5
5.4K Ratings

5.4K Ratings

OnEdEl ,

Great App

App works great, does what it says. App is as described & useful. Can’t comment on accuracy as had no stand alone decibel metre to compare it against but it seems to be roughly correct as what I’d expect.

There is a premium version that may be worth it for certain users but the free version is great for 99% of users. Hearing test feature is nice touch also.

FYI: If you want to check noise level of a Bluetooth speaker connected to your phone, it won’t work as it pauses the music as soon as you open app. This may, in part, be down to Apple. It would be great to see developers create a workaround (must be possible as snapchat uses camera and mic and leaves music playing). Not so much of a criticism but a suggestion for future updates.

Developer Response ,

Thank you for your positive feedback. Will try to find some workaround to get it work as expected in future releases.

loudness user ,


Seems to work ok. Without trying it side by side against a calibrated reference system it’s quite difficult to say how accurate it is in absolute terms. But it has plenty of functions. Different loudness weightings, an FFT which gives you a vague idea of what’s going on (but which has no scale.). Also a dosemeter and that’s a pretty useful function.

Given what a fully calibrated, fully functioned system with a reference mic would cost you - plenty of cash - I would say that you get a good value system for the modest amount of money this app costs.

Developer Response ,

Thank you for using Decibel and for sharing your positive feedback, I really appreciate it.

The app is calibrated using high-quality equipment so you can rest assured that the measurements it provides are very accurate and comparable to expensive dB meters. On top of this, I am constantly working on improving its features and functionality to match different user needs as required.

Thank you again for your kind words and wish you all the best!

sn-reciew ,

Good app, but be careful as accidental purchase of App is too easy.

App is great, but the pop up messages can give rise to accidental purchases. Initially I felt quite angry, though got a refund from Apple. Moreover, the developer responded thoroughly, thoughtfully, and professionally. I think he is genuinely trying to build a great app, but is just struggling to stop accidental purchases. These seem the only problems reducing his AppStore rating, and so I am certain that he knows it is in his interests to correct the situation. On the basis that I would prefer to help a developer, than blame him for how easy Apple makes purchasing with touch or faceID I have adjusted my review from 1 to 4 stars. The only reason it’s not 5 stars is the problem around the App purchase design. Which I am sure he will be making efforts to improve.

Developer Response ,

Thank you for your review. I'm working hard to improve this flow at the moment. I believe the work will be finished within a month or two and i'll get 5-stars from you. Thanks!

In-App Purchases

Spectrum Analyzer Pack
Spectrum Analyzer Pack
Full access to FFT, Spectrogram & Octave RTA
Decibel Meter Pro
Decibel Meter Pro
Save. Export. Get access to dB-A, C, Z
Noise Dosimeter Pro
Noise Dosimeter Pro
Get notifications & measure in background
dB Meter Premium Pack
dB Meter Premium Pack
Lifetime access to all features

App Privacy

The developer, Vlad Polyanskiy, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • User Content

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Health & Fitness
  • Purchases
  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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