Agile Partners has AmpKit+ – Guitar amps and effects recording studio with backing tracks, tuner and metronome (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE (regularly $19.99) for a limited time.

AmpKit+ transforms your iPad, iPhone, or iPod touch into a powerful guitar amp & effects studio. It includes 4 amps and matching cabinets, 10 pedals and 8 mics. It records, re-amps, is a tuner, metronome, and offers cloud sharing.