NATIVE INSTRUMENTS GmbH has Traktor DJ (iTunes Link) for the iPhone and iPod touch and Traktor DJ (iTunes Link) for the iPad in the iTunes App Store for FREE (regularly $4.99 / $19.99)for a limited time.

The world’s #1 pro DJ software brings high-impact DJing to iPhone, iPod Touch, and iPad. Touch your tracks and create stunning mixes in seconds.

Instantly sync the sets you create in TRAKTOR DJ with TRAKTOR PRO 2, the world’s leading DJ software, and turn your laptop into a DJ rig. Spin tracks on up to four decks, work the crowd with a wide range of studio-quality effects, and express your creativity with TRAKTOR’s acclaimed Remix Deck™ technology. Bring your sound to the people with TRAKTOR’s pro-quality audio interfaces TRAKTOR AUDIO 10 and TRAKTOR AUDIO 6.

Get physical with TRAKTOR hardware. For total control, try the all-in-one DJ systems TRAKTOR KONTROL S4 and S2. Control your digital tracks with turntables or CD decks using TRAKTOR SCRATCH digital vinyl systems, or use dedicated TRAKTOR add-on controllers to enhance your DJ sets with loops and creative live remixing. And now, drawing on over ten years of innovation and DJing expertise, TRAKTOR DJ brings pro DJing to the iPad.