Great app

No excuse for not having this on your iPhone if you are involved with audio at all. I play guitar primarily and will use this to check that the amp is set as close as possible to the same output level everytime I have to re-setup. Makes your sound guy happy! For home recording I use this to compare the output of my mix to a similar professional commercial mix when mastering a song. Again, just a handy app to keep on your smartphone for any occasion. Kudos to the developers, one of the few apps left that work with a darn on an iPhone 3G.

John 3:14 about SPL Meter, v5.2