I really like this app! There is a slowdown feature which allows you to play things slower- along with a clear video of hand fingering and the tab as each note is struck. If song is broken down into small manageable segments which allows you to learn each little piece at your own pace. There is a wide variety of songs to choose from and each costs a few dollars. There is a back up track for you to sing along with it if you want- as well as the full track with the singing so you know the timing! Its not a real live guitar teacher but its pretty darn awesome!
Susanne angela about Guitar : Play & Learn Chords, v4.0