For a free App, I'm giving it 5 stars. As long as your phone's microphone is of good quality, this app will work well. I ran this along a calibrated hand meter and adjusted accordingly, so as long as you are ok being off a few dB here and there, you can't beat the convenience of measuring SPL levels on the fly like this.
After being tormented by a neighbors base and the police telling me I had to gather evidence, this app shows the beat that's coming from his house! I wish I could save as proof but at least the police can see what's being transmitted.
I use this free device to show my students a guide to noise level at 2 metres away. Again if want 100 % then I'd buy one for £150 say this is good free app
Very easy to use and very helpful in helping me control the loudness of my voice as I've a hearing loss, plus my dog barks at 85 dB so now I know why my friends go ow! when he barks!
I don't t use it much, which is why I wouldn't have bought it. But it works right away, and pretty accurately when comparing different types of sounds. - and no learning curve!
I'm very hard of hearing. I use this to set TV volume to prevent further deterioration of my hearing. Works Great especially in the evenings.
Measure noise & sound level with precise decibel reader & sound meter/detector