Useless for me. The plan was to use it as a built in meter in my dash. Since my install is landscape, all output from this app is sideways.
Also, I cant seem to find a way to change weighting
Microphone bit is lame, lots of feedback. Seems like a useless addition
Reference library is ok, but info can be easily found without gloating the app
Sine wave generator can be fine tuned on the second page, but the slider doesnt increment smoothly (jumps 55ish frequencies at a time)
It works, but there are better apps out there.
rockinthesixstring about Audio Tool, v1.0.4