Best learning app for beginners!
Incorrect finger positioning on chords is one of the biggest delay-in-progress causes for beginner players (and even a few intermediates). Uberchord doesnt let you progress until you have repeatedly hit a given chord exactly right. If youre on an acoustic all you need is a pair of headphones. On an electric you also need an iRig. I took two lessons with my nephew and was kind of blown away by the 20-minute focus the 12 year old was able to sustain. And the app is free! If you are starting out or looking for exercise/practice on the go, do not look further than Uberchord!
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Uberchord — Learn Guitar. Chords, Songs, Tuner., v1.8.4