Frequency Spectrum Analyzer 4+

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.

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

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.

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

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.

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!