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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 !

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


- 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.

Ratings and Reviews

4.6 out of 5
1.3K Ratings

1.3K Ratings

beautamousmunch ,

Questionable. Not going to give it time to find out.

As I was looking at the app after downloading, a screen came up telling me charges about free trial and how much for one month and then for one year. It looked like the trial was about to start - NOWHERE was there an option to opt-out. After I finish this, I am going to delete the app; if this part wasn't clear enough what about other parts? Too bad coz I really wanted to use it. Prices were reasonable, but I'm not a mind reader.

Developer Response ,

Hi! Please follow this link to modify or cancel your subscription: https://support.apple.com/HT202039. Please note that you can still use the free restricted version of the app, without any subscription.
For the refund, please write to support-decibel@mwmapps.com. Regards, Alice

LightSkyRevenge ,


I had to pay in order to use it? Come on, you never mention there was a trial I had to go through. I deleting the app.

Developer Response ,

Hi! You don't have to pay if you don't want to! You can still use the free restricted version of the app. The subscription offered in TaoMix is totally optional but allows you to have access to all the app’s premium features. Alice

Yahaag110 ,


Thank you for your help me 🙏🌹


27.7 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Monthly Premium Pass $4.49
  2. Annually Premium Pass $16.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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