Gibson, maker of fine guitars, has teamed with Legacy Learning Systems to produce an app that lets you do things from tune your guitar to learn to play (better). With the Gibson Learn & Master Guitar app, you can tune your guitar using the chromatic tuner (using this with the touch requires a microphone) or by ear using the simple tuner (shown in picture). You can even choose to tune to alternate settings. There’s a metronome, a chord library with a sample of the essential chords for players of all levels, and you can watch free, full-length guitar lessons from the award-winning Learn & Master guitar course. The Gibson Learn & Master Guitar app is free at iTunes.