My favorite rock bassist, Megadeth’s David Ellefson, released a new app for iPhone and iPad on Tuesday.

David Ellefson Rock Shop is more than just an amp and effects emulation app. While it does allows users to dial in guitar and bass tones, it also includes a number of extras for musicians and Ellefson fans.

An integrated Song Trainer lets you slow down songs to make it easier to learn how to play them. Trainer also includes controls for speed, pitch and looping a section of the song.

“With sales of hand-held’s dwarfing PCs, mobile apps and devices are the most important new tools for musicians,” said Ellefson. “At home and on tour, when I’m not on stage, the Rock Shop has my whole world right there.”

David Ellefson Rock Shop is available on the App Store for $9.99.