Noise Control App Reviews

I am using this as a classroom management tool in my middle school classroom. My students have responded positively to this app. I recommend plugging your phone into a pair of computer speakers because the warning sound is too low on the phone speaker.

I read other reviews and worried, but I NEEDED to try. Works GREAT for me! Maybe it was the new version? Maybe it's the new 3.1 OS update? I don't care, it works!