This app is currently broken

The developers introduced a bug in the last version that causes the metronome to go way down in volume when you switch to the tuner. The only way to get the volume back up is to restart the app. They have known about this bug for quite a while but havent bothered to fix it. I wouldnt buy this app if you want to use it as a tuner/metronome as you spend an awful lot of time opening and closing the app.

bondsong about GuitarToolkit - tuner, metronome, chords & scales, v2.3