What Is the Best Free Decibel Meter App?

Patrick Burnett

Are you looking for a reliable and accurate decibel meter app? Whether you work in construction, music, or are simply curious about the sound levels around you, a decibel meter app can be incredibly useful.

And the best part? There are plenty of free options available! In this article, we’ll explore some of the best free decibel meter apps on the market.

What Is a Decibel Meter App?

Before we dive into our list of top picks, let’s first define what a decibel meter app is. A decibel meter app is a tool that measures sound levels in your environment using your smartphone’s microphone. It provides real-time data on sound intensity and can help you determine if the noise levels in your surroundings are safe or potentially harmful.

How Do Decibel Meter Apps Work?

Decibel meter apps use your phone’s microphone to capture sound waves in the air. The app then translates these waves into decibels using algorithms that take into account factors such as frequency and amplitude. The resulting measurement is displayed on your phone’s screen and updated in real-time as the sound levels change.

Top Free Decibel Meter Apps

Now that we’ve covered the basics let’s take a look at some of the best free decibel meter apps available for download.

1) Sound Meter

Sound Meter is a popular choice among both iOS and Android users. This app features an easy-to-read interface that displays real-time noise levels in both analog and digital formats.

It also includes a graph function that allows you to track sound levels over time. Sound Meter is free to download but does include ads.

2) Decibel X

Decibel X is another great option for both iOS and Android users. This app provides accurate measurements of sound levels up to 102 dBA with a resolution of 0.1 dB.

It also includes a variety of useful features such as a noise dosimeter, sound level history charts, and the ability to export data in CSV format. Decibel X is free to download but offers in-app purchases for additional features.

3) Noise Meter

Noise Meter is an iOS-only app that provides real-time sound level measurements in both dBA and dBC scales. It also includes a noise alert function that notifies you when sound levels exceed safe limits.

Additionally, Noise Meter allows you to save and export your data for later analysis. This app is free to download but does include ads.


A decibel meter app can be an incredibly useful tool for anyone who needs to measure sound levels in their environment. While there are plenty of paid options available on the market, these three free apps provide accurate measurements and useful features that make them stand out from the crowd. So if you’re looking for a reliable decibel meter app, give one of these options a try and see which one works best for you!