This video demos some live remixing on the iPhone with SoundTrends' Looptastic Gold.
Here's what Soundtrends has to say about Looptastic Gold:
Looptastic is a performance remix tool for the iPhone and iPod Touch. Tear apart tracks with your fingertips. Crossfade and filter. Play live through headphones or speakers. It’s a party in your pocket.
Pricing and Availability
Looptastic Gold is a free app, and it's available now in the App Store. SoundTrends offers additional sample libraries as "in-app" purchases.
Designed for dedicated use with rekordbox dj professional performance application
Kontakt based hybrid library combines instruments with synths