Jam with a good drummer on-the-go. Hundreds of high-quality, tempo adjustable drum loops at a touch. Go screen off and get into your music. Jam Beats is the ultimate tool for musicians. Play. Create. Jam!
Performance improvement.
Drum Beats+ Rhythm Machine 
Guitar Jam Tracks - Scale Trainer & Practice Buddy 
Guitar Lick Master - 50+ Licks, Ultimate Trainer with Smart Tabs 