GuitarRx turns your android smart phone into a mobile guitar riff hub that will help you practice.
The is a free Android app that comes pre-loaded with 5 practice segments. Additional 5 free riff lessons will be available every 2 days over the first 1-2 weeks of installing this app.
Note that the free lessons provided are generic riffs, because any lessons involving commercial songs will require the payment of royalties. Through the "More" button within the app, you can buy bundles that will contain popular guitar riffs and licks from well known songs.
With the app you can learn iconic riffs from songs like Black Magic Woman, Reelin in the Years, Brick in the Wall, China Grove, One of Theses Nights, Ramblin Man, Sweet Home Alabama, Stairway to Heaven and much more.
You will also have access to riffs from the who's who of guitar legends: Jimi Hendrix, Jimmy Paige, Joe Walsh, Eric Clapton, Stevie Ray Vaughn, Carlos Santana, Jeff Beck, BB King and many, many more.
The lessons are easy to follow, with full and half speed real guitar audio, accurate tabs, and it even has a "take away" for each lesson.