Lot's of lag time, not very accurate. – SoundLevel: Decibel Reading Review

Used this meter while chaperoning a high school dance. It did not work very well. As a physicist I also had an Extech dedicated meter. This app never matched the Extech. Even with obvious changes in loudness (song stopped) the meter did not change its reading. Downloaded Decibel 10th and it worked much better.
Review by tachyonbb on SoundLevel: Decibel Reading.