Very fun!

If your stuck in the "Key of E"
Rut. This app lets you noodle around until you find the notes that go with the other keys.(for those of us who were too lazy to learn theory) "Hendrix didnt read music" thats true but after 20+ years of playing in the dark, I see now that Ive missed out on so much because I didnt take the time.
If your just starting out take it from me, its worth the time to learn. Great app!

Wilberjhead about Guitar Jam Tracks: Scale Buddy, v3.5