Decibel : dB sound level meter 4+

Audio noise Spectrum Analyzer

Vlad Polyanskiy

Designed for iPad

    • 4.6 • 35.5K 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 and audiogram directly to Health app.

● Noise dosimeter will help you understand how noisy it is at home and at your workplace. In the event your daily permissible dose of noise is exceeded, use Noise-absorbing headsets or Earplugs.

● Enables you to overlay the ambient noise level onto photos and videos and to export the results.

● 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.

By downloading and using the app you are agreeing with
Terms of Use:
Privacy Policy:

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
35.5K Ratings

35.5K Ratings

hearbetter ,

A valuable, reliable and convenient sound meter

For the past several years i have used this sound meter app to test each power tool in my woodshop and even my power sprayer. The meter shows the sound levels instantly in a very clear and easy to re-display. I then replaced some of my power tools like the small hand sanders with quieter units. For example I found that the Dewalt square sheet sander was much quieter than my previous small sander. I have 3M tech over the ear muffs in the shop but based on some of these readings I added foam earplugs as well.
Also i simply use this phone app to test any new devices or equipment I’m interested in buying in stores as well.
Keep in mind that the decibel level of a tool or concert depends on where you’re using it or standing. For example if you use a small high decibel device in the corner of a room it can be much much louder and more dangerous then if you use it in the center of a room!! I now, based on these meter readings, also bring earplugs to concerts and move further from the stage as needed to lower the decibels.

Developer Response ,

Hi there, thank you very much for your interesting and detailed feedback. Your support helps the developer to make the app better. Enjoy and stay safe

Julie12345678910111213 ,

Accurate as a phone app can get

Thank you for this app. I was looking for something that could give me a general idea of the sound dB ranges in different locations. Since I only needed a general range for this project I looked for a free or low cost app. It worked better than I expected a phone app would be able to.
I felt the need to leave a review as I am surprised at the amount of people that left negative reviews. The iPhone mic is quite different than a calibrated device that cost $100 and up. Not to mention variances in cases, dirt build up, people’s hand placement, even the direction the mic is being pointed at could slightly alter results. All that said this was accurate within 5db up or down in my results. Considering all I mentioned above that is pretty good. If you need something highly accurate for something of importance you should be looking into an calibrated device made for such things.

Developer Response ,

Thank you so much for your positive feedback. It's inspired.

JamieReneeH ,

Very nice

I installed the app because I needed to check the volume difference between my guitar with and without an amplifier . My ears alone could not determine how much difference there was.

I was not happy to see the free version was only for 3 days but I did not stress over it since I could unsubscribe. I don’t mind paying for a good app because that allows good developers to create things that work great for me.

After I installed it I went through and looked at all the options and I realized how many more things I could be doing with it that I was not aware was in the app. For instance, I know I have some hearing loss and this app has a feature where you can test your hearing. This app will also allow me to check the DB level in some of the industrial environments that I work in.

There are some limitations though. For instance this app is not a frequency counter to tell you what the frequency is of the sound you hear but then it is not advertised as that. An additional limitation would be the frequency response of the microphone in your phone. So if you needed to get an absolute precise frequency level you would probably have to get an expensive sound level meter.

On first use this is an excellent application and worth the price as long as you have a valid use for it.

Developer Response ,

Thank you for taking the time to provide such a detailed and positive review. I really appreciate your support and I am glad you found the Decibel app's features useful and practical and they came in handy for your specific needs.

I hope you continue using and enjoying Decibel and wish you all the best!

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, for example, based on 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.

More By This Developer

Color Name AR
Audio Spectrum Analyzer Pro
ToolBox: AR Ruler, Level Tool
Leo the Cat - Fun Stickers
dB Meter & Spectrum Analyzer
Reverse Image Search by Photo

You Might Also Like

Decibel X:dB Sound Level Meter
NIOSH Sound Level Meter
Sonic Tools SVM
Sound Meter HQ
dBMeter - Decibelmeter
Decibel Meter:Sound Level