Many features, many bugs

You get what you pay for? Lots of potential, but this app is relatively confusing, with a bad UI, and sadly, the "record a sample" feature (that is intended to include the data log into an e-mail) appears to be broken, at least in recent versions of iOS.

That said, if youre looking for a free sound metering app, this one has some solid features, for free. Just takes some patience to figure out its quirks.

mack_r about Decibel Ultra