It seems that Guitar Toolkit is for iPhone only - so what are the best Android apps for guitar tuning and stuff?
I have tried lots of android guitar apps. The one I like best for tuning is gStrings, I think, it's the most accurate tuner I have tried. Guitar Jam Box is a good app, with chords and scales, and will play the chord/scale for you if you want. GT tools is also a good tuner, metronome, and chord library. Those are the three I always come back to, and gStrings is what I always use to tune.